New & Used Electrical Power Transformers

ESU, Inc. has a large inventory of new and used buck boost and auto transformers  If you require I phase 3 Phase 208/240, 208 to 240, 208 to 480, 120 to 240 or other voltages we usually have the transformer in stock.

We usually stock Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE  Federal Pacific, Square D, General Electric and Zinsco products.

We also carry a wide variety of commercial power transformers. Low Voltage Distribution General Purpose Commercial Transformers for all of San Diego. ESU offers a wide selection of electrical products that include buck-boost transformers, low voltage lighting transformers, mini power centers, and autotransformers.

All our recycled equipment has been tested and has our guarantee.

ESU is your trusted partner in electrical supplies with over 40 years of industry expertise! As a seasoned leader, we take pride in our extensive inventory of new, surplus, and recycled electrical power transformers, catering to both commercial and residential markets. Our commitment to sustainability and quality ensures that our customers have access to a diverse range of transformers that meet the highest industry standards. With a legacy built on reliability and customer satisfaction, ESU remains at the forefront of the electrical supplies sector, providing innovative solutions to power the present and future. Explore our vast inventory and experience the ESU difference – where experience meets excellence in electrical supply solutions.

Electrical Supplies Unlimited, or ESU Inc, is your trusted partner in the electrical supply industry for over four decades. With a rich legacy spanning 40 years, ESU has been a cornerstone for electricians in San Diego, providing top-notch electrical products and unmatched expertise. Our commitment to quality and reliability has made us a go-to resource for professionals seeking a comprehensive range of electrical supplies.

At ESU, we understand the dynamic needs of electricians, and our extensive experience allows us to cater to the unique requirements of the San Diego market. As a testament to our dedication, ESU is not only a leading supplier but also a reliable destination for those looking to sell excess electrical transformer inventory. We pride ourselves on fostering lasting relationships with our customers, ensuring they have access to cutting-edge products and services. Trust ESU Inc for all your electrical supply needs – where experience meets excellence, and your satisfaction is our priority.

An electrical transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors—the transformer's coils. A varying current in the first or primary winding creates a varying magnetic flux in the transformer's core and thus a varying magnetic field through the secondary winding. This varying magnetic field induces a varying electromotive force (EMF), or "voltage", in the secondary winding. This effect is called mutual induction. 

A single phase transformer is a type of transformer which operates on single-phase power. 

Single-phase transformers are usually used for single special applications or voltages. For instance, equipment that specifically requires 240 volts single-phase where the service voltage is 120/208 volts. For an application like this, it is common to only provide a single-phase transformer for the equipment because there won’t be a different electrical loads served by it. 

Phase imbalances can occur when a single-phase transformer is used for general distribution while using a three-phase utility. If a property is served by single-phase and a transformer is used (e.g., for isolation) then a single-phase transformer would be appropriate.

Three-phase transformers are a type of transformers that are used to change voltages of electrical systems with three phases. There are different types of configurations for three phase transformers: star-star, delta-delta, star-delta, and delta-star. 

Core-type transformers act as a single-core, three-phase transformers where each phase is magnetically coupled to each other.

ESU buys, sells and stocks Dry Electrical Transformers 

Welcome to the world of Dry Electrical Transformers! These innovative transformers have revolutionized the electrical industry with their cutting-edge technology and eco-friendly design. Unlike traditional liquid-filled transformers, Dry Electrical Transformers are void of any flammable fluids, making them exceptionally safe and environmentally conscious. Their compact and lightweight construction ensures easy installation, saving both time and resources. With superior thermal efficiency and reduced energy losses, these transformers promise exceptional performance and cost-effectiveness. Whether for industrial applications, commercial buildings, or renewable energy projects, Dry Electrical Transformers stand as a testament to sustainability and reliability. Join the green revolution today with these state-of-the-art transformers and power your future with confidence. Explore our extensive range of Dry Electrical Transformers and embrace the future of energy efficiency!

 ESU, Inc. has a large inventory of new and used transformers  If you require I phase 3 Phase 208/240, 208 to 240, 208 to 480, 120 to 240 or other voltages we usually have the transformer in stock.

We usually stock Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE  Federal Pacific, Square D, General Electric and Zinsco products.

We also carry a wide variety of commercial power transformers. Low Voltage Distribution General Purpose Commercial Transformers for all of San Diego. ESU offers a wide selection of electrical products that include buck-boost transformers, low voltage lighting transformers, mini power centers, and autotransformers.

All our recycled equipment has been tested and has our guarantee.

Welcome to ESU, your go-to electrical supplies partner in the San Diego area. At ESU, we specialize in buying, selling, and stocking a wide range of electrical transformers, including new, surplus, and recycled options. Our focus is on providing high-quality electrical solutions to both electricians and homeowners, ensuring access to reliable products that meet various needs. Whether you're looking for transformers for a residential project or need surplus options to fit within a budget, ESU has you covered. Our commitment to quality and sustainability makes us a trusted source for electrical transformers in the San Diego community.

ESU takes pride in offering a diverse selection of electrical transformers, including the highly sought-after dry electrical transformers. Unlike traditional transformers immersed in liquid, dry transformers use solid insulation materials, eliminating the need for liquid coolant. This design makes them particularly suitable for indoor installations, offering enhanced safety and reduced maintenance requirements. With ESU, you not only gain access to a broad range of electrical supplies but also to expertise that ensures you find the right transformer for your specific application, contributing to a more efficient and sustainable electrical system. Explore our inventory today and discover the ESU difference in electrical solutions.

For electricians and homeowners seeking a reliable source for electrical supplies in San Diego County, look no further than Electrical Supplies Unlimited (ESU). We specialize in providing a wide range of electrical products, including new, surplus, and recycled dry electrical transformers. Whether you're in need of equipment for a residential project or a commercial endeavor, ESU has you covered. Our comprehensive inventory ensures that you'll find exactly what you need to get the job done efficiently and safely. With our commitment to quality and customer satisfaction, you can trust ESU to be your go-to supplier for all your electrical supply needs.

Electrical Supplies Unlimited (ESU) is the premier destination for electricians and homeowners alike in San Diego County seeking top-quality electrical supplies. As your trusted supplier, ESU offers a diverse selection of new, surplus, and recycled dry electrical transformers to meet your specific project requirements. Whether you're upgrading your home's electrical system or completing a large-scale commercial installation, our extensive inventory and competitive prices ensure that you have access to the products you need without compromising on quality. Count on ESU to provide reliable, efficient, and cost-effective solutions for all your electrical supply needs.

ESU buys, sells and stocks 240V Transformers

Looking for efficient and reliable power solutions? Our 240v Electrical Transformers are the perfect choice! Designed to convert voltages and ensure a smooth power supply, these transformers play a vital role in various applications. Whether you need them for industrial machinery, commercial establishments, or residential settings, our high-quality 240v Electrical Transformers are engineered to meet safety standards and deliver optimal performance. With their advanced technology and robust construction, you can trust them to handle voltage fluctuations and protect your valuable equipment. Discover the benefits of our 240v Electrical Transformers and experience enhanced power management like never before. Explore our wide range of options and make a smart investment in a power solution that guarantees efficiency and longevity. Get ready to power up your operations with ease and confidence!

Welcome to ESU, your go-to electrical supplies company in San Diego, offering a comprehensive range of new, surplus, and recycled electrical transformers. As a trusted name in the industry, ESU specializes in buying and selling quality transformers to cater to the diverse needs of electricians and homeowners alike. Our extensive inventory includes 240V electrical transformers, providing a crucial solution for various applications. Whether you're a professional electrician working on a commercial project or a homeowner looking to upgrade your electrical system, ESU has you covered. Our commitment to quality, sustainability, and affordability sets us apart, ensuring you find the right transformer for your specific requirements. Explore our inventory today and experience the ESU advantage in electrical supplies.

A 240V electrical transformer is a vital component in electrical systems, especially in regions like San Diego. These transformers play a crucial role in converting electrical voltage from one level to another, ensuring compatibility and safety for various devices and appliances. In simpler terms, a 240V transformer transforms electrical energy, either stepping up or stepping down the voltage as needed. For homeowners and electricians in San Diego, having access to quality 240V transformers is essential for powering appliances, lighting, and other electrical devices efficiently. At ESU, we take pride in offering a range of these transformers, both new and recycled, to meet the demands of our customers and contribute to a sustainable electrical supply ecosystem.

 ESU, Inc. has a large inventory of new and used transformers  If you require I phase 3 Phase 208/240, 208 to 240, 208 to 480, 120 to 240 or other voltages we usually have the transformer in stock.

We usually stock Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE  Federal Pacific, Square D, General Electric and Zinsco products.

We also carry a wide variety of commercial power transformers. Low Voltage Distribution General Purpose Commercial Transformers for all of San Diego. ESU offers a wide selection of electrical products that include buck-boost transformers, low voltage lighting transformers, mini power centers, and autotransformers.

For electricians and homeowners seeking reliable electrical supplies in San Diego County, look no further than Electrical Supplies Unlimited (ESU). We specialize in providing a comprehensive range of electrical components, including 240V transformers, catering to both commercial and residential needs. As a trusted supplier, we buy, sell, and stock new, surplus, and recycled transformers, ensuring that our customers have access to quality products at competitive prices. Whether you're upgrading your electrical system or completing a renovation project, ESU has you covered with a wide selection of transformers to meet your specific requirements. Count on us for exceptional service and top-notch products that keep your projects running smoothly.

Electrical Supplies Unlimited (ESU) is your go-to destination for all your electrical supply needs in San Diego County. Whether you're an electrician working on a commercial project or a homeowner tackling a DIY renovation, we have the 240V transformers you need to get the job done right. At ESU, we buy, sell, and stock a variety of transformers, including new, surplus, and recycled options, ensuring that you have access to high-quality products at affordable prices. Our knowledgeable team is dedicated to helping you find the perfect solution for your electrical needs, and our extensive inventory means you can always count on us to have what you need in stock. Experience the convenience and reliability of ESU for all your electrical supply needs today.

All our recycled equipment has been tested and has our guarantee.

AC Electric Transformers at ESU

If you are looking to purchase high-quality AC electrical transformers from reliable manufacturers, look no further! We offer a wide range of top-notch AC electrical transformers, designed to meet diverse industrial and commercial needs. Our transformers are manufactured by industry-leading companies known for their excellence in engineering and product performance. With a strong focus on durability, efficiency, and safety, our selection ensures optimal power distribution and seamless operation in various applications. Whether you require single-phase or three-phase transformers, our product lineup has you covered. Experience peace of mind and enhanced productivity with our premium AC electrical transformers sourced from reputable manufacturers. Don't miss out on this opportunity to elevate your power distribution system to new heights! Contact us today to explore our extensive collection and find the perfect match for your requirements.

At ESU we strive to be your go-to electrical supplies destination in the San Diego area for Electrical Supplies. We take pride in our comprehensive services, offering a unique blend of buying, selling, and stocking new, surplus, and recycled electrical transformers. Whether you're an electrician looking for reliable equipment or a homeowner in need of a transformer solution, ESU has you covered. Our vast inventory ensures that you have access to top-quality AC electric transformers that meet the highest industry standards. We understand the importance of reliable electrical components, and our team is committed to providing cost-effective and sustainable solutions for all your transformer needs. Trust ESU for unparalleled expertise and a diverse range of products that cater to professionals and homeowners alike.

An AC electric transformer, or alternating current transformer, is a crucial component in electrical systems. It functions to transfer electrical energy between circuits through electromagnetic induction. AC transformers are vital for adjusting voltage levels, ensuring that electricity can be efficiently transmitted across various devices and systems. With their ability to step up or step down voltage, these transformers play a critical role in optimizing electrical distribution, making them essential for both residential and commercial applications. At ESU, we offer a range of AC electric transformers, providing San Diego residents, electricians, and businesses access to reliable and efficient solutions for their electrical needs.

 ESU, Inc. has a large inventory of new and used transformers  If you require I phase 3 Phase 208/240, 208 to 240, 208 to 480, 120 to 240 or other voltages we usually have the transformer in stock.

We usually stock Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE  Federal Pacific, Square D, General Electric and Zinsco products.

We also carry a wide variety of commercial power transformers. Low Voltage Distribution General Purpose Commercial Transformers for all of San Diego. ESU offers a wide selection of electrical products that include buck-boost transformers, low voltage lighting transformers, mini power centers, and autotransformers.

All our recycled equipment has been tested and has our guarantee.

For electricians and homeowners seeking a reliable source for electrical supplies, look no further than Electrical Supplies Unlimited (ESU). Serving San Diego County, ESU is your go-to destination for a wide range of electrical components, with a specialization in AC Electric Transformers. Whether you're in need of new, surplus, or recycled transformers, ESU has you covered. Our extensive inventory ensures that you'll find the perfect solution for your project, whether it's a residential wiring upgrade or a commercial installation. With ESU's commitment to quality and customer satisfaction, you can trust that you're getting top-notch products at competitive prices. Streamline your electrical supply needs with ESU and experience unparalleled convenience and reliability.

Electrical Supplies Unlimited (ESU) is your partner in electrical projects, offering a comprehensive range of supplies for both electricians and homeowners throughout San Diego County. Specializing in AC Electric Transformers, ESU stands out as a trusted source for new, surplus, and recycled transformers. Whether you're a professional electrician working on a commercial job or a homeowner tackling a DIY project, ESU provides the quality products you need to get the job done right. With our extensive stock and commitment to customer satisfaction, ESU is the smart choice for all your electrical supply needs. Explore our inventory today and discover why ESU is the preferred supplier for electricians and homeowners alike.

ESU, Inc. has a large inventory of new and used buck boost and auto transformers  If you require I phase 3 Phase 208/240, 208 to 240, 208 to 480, 120 to 240 or other voltages we usually have the transformer in stock.

We usually stock Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE  Federal Pacific, Square D, General Electric and Zinsco products.

We also carry a wide variety of commercial power transformers. Low Voltage Distribution General Purpose Commercial Transformers for all of San Diego. ESU offers a wide selection of electrical products that include buck-boost transformers, low voltage lighting transformers, mini power centers, and autotransformers.

For four decades, Electrical Supplies Unlimited has been the go-to source for electrical supplies in San Diego, proudly serving electricians and electrical companies with top-notch products and unparalleled expertise. With a rich legacy of 30 years in the industry, we have established ourselves as a trusted supplier, stocking a comprehensive range of new and used power transformers, circuit breakers, panel boards, and various other electrical essentials. Our commitment to excellence is evident in our diverse inventory and our dedication to meeting the unique needs of electricians across San Diego. Whether you're working on a residential project or a large-scale commercial venture, Electrical Supplies Unlimited is here to provide the quality products and personalized service that have been our hallmark for over three decades.

Electrical Supplies Unlimited stands as a beacon of reliability for electricians and electrical companies in San Diego, offering a vast selection of electrical supplies for over 30 years. As a seasoned supplier, we take pride in our extensive stock of new and used power transformers, circuit breakers, panel boards, and more, catering to the diverse needs of electricians across the region. Our commitment to providing high-quality products is matched only by our dedication to exceptional customer service. At Electrical Supplies Unlimited, we understand the unique requirements of electricians and electrical projects, and our experienced team is ready to assist you in finding the right solutions. Trust us as your partner in electrical supplies, where decades of expertise meet a commitment to quality that has stood the test of time.

All our recycled equipment has been tested and has our guarantee.

An electrical transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors—the transformer's coils. A varying current in the first or primary winding creates a varying magnetic flux in the transformer's core and thus a varying magnetic field through the secondary winding. This varying magnetic field induces a varying electromotive force (EMF), or "voltage", in the secondary winding. This effect is called mutual induction. 

A single phase transformer is a type of transformer which operates on single-phase power. 

Single-phase transformers are usually used for single special applications or voltages. For instance, equipment that specifically requires 240 volts single-phase where the service voltage is 120/208 volts. For an application like this, it is common to only provide a single-phase transformer for the equipment because there won’t be a different electrical loads served by it. 

Phase imbalances can occur when a single-phase transformer is used for general distribution while using a three-phase utility. If a property is served by single-phase and a transformer is used (e.g., for isolation) then a single-phase transformer would be appropriate.

Three-phase transformers are a type of transformers that are used to change voltages of electrical systems with three phases. There are different types of configurations for three phase transformers: star-star, delta-delta, star-delta, and delta-star. 

Core-type transformers act as a single-core, three-phase transformers where each phase is magnetically coupled to each other.

ESU buys, sells and stocks Electrical Supplies for Electricians

ESU buys, sells and stocks Electrical Supplies for Electricians. Power Transformers, Circuit Breakers, Fuses, Panelboards and much more. For transformers, ESU, Inc. has a large inventory of new and used buck boost and auto transformers  If you require I phase 3 Phase 208/240, 208 to 240, 208 to 480, 120 to 240 or other voltages we usually have the transformer in stock.

We usually stock Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE  Federal Pacific, Square D, General Electric and Zinsco products.

We also carry a wide variety of commercial power transformers. Low Voltage Distribution General Purpose Commercial Transformers for all of San Diego. ESU offers a wide selection of electrical products that include buck-boost transformers, low voltage lighting transformers, mini power centers, and autotransformers.

For four decades, Electrical Supplies Unlimited has been the go-to source for electrical supplies in San Diego, proudly serving electricians and electrical companies with top-notch products and unparalleled expertise. With a rich legacy of 30 years in the industry, we have established ourselves as a trusted supplier, stocking a comprehensive range of new and used power transformers, circuit breakers, panel boards, and various other electrical essentials. Our commitment to excellence is evident in our diverse inventory and our dedication to meeting the unique needs of electricians across San Diego. Whether you're working on a residential project or a large-scale commercial venture, Electrical Supplies Unlimited is here to provide the quality products and personalized service that have been our hallmark for over three decades.

Electrical Supplies Unlimited stands as a beacon of reliability for electricians and electrical companies in San Diego, offering a vast selection of electrical supplies for over 30 years. As a seasoned supplier, we take pride in our extensive stock of new and used power transformers, circuit breakers, panel boards, and more, catering to the diverse needs of electricians across the region. Our commitment to providing high-quality products is matched only by our dedication to exceptional customer service. At Electrical Supplies Unlimited, we understand the unique requirements of electricians and electrical projects, and our experienced team is ready to assist you in finding the right solutions. Trust us as your partner in electrical supplies, where decades of expertise meet a commitment to quality that has stood the test of time.

All our recycled equipment has been tested and has our guarantee.

An electrical transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors—the transformer's coils. A varying current in the first or primary winding creates a varying magnetic flux in the transformer's core and thus a varying magnetic field through the secondary winding. This varying magnetic field induces a varying electromotive force (EMF), or "voltage", in the secondary winding. This effect is called mutual induction. 

A single phase transformer is a type of transformer which operates on single-phase power. 

Single-phase transformers are usually used for single special applications or voltages. For instance, equipment that specifically requires 240 volts single-phase where the service voltage is 120/208 volts. For an application like this, it is common to only provide a single-phase transformer for the equipment because there won’t be a different electrical loads served by it. 

Phase imbalances can occur when a single-phase transformer is used for general distribution while using a three-phase utility. If a property is served by single-phase and a transformer is used (e.g., for isolation) then a single-phase transformer would be appropriate.

Three-phase transformers are a type of transformers that are used to change voltages of electrical systems with three phases. There are different types of configurations for three phase transformers: star-star, delta-delta, star-delta, and delta-star. 

Core-type transformers act as a single-core, three-phase transformers where each phase is magnetically coupled to each other.

Circuit Breakers - We Buy, Sell and Stock New, Used and Surplus Eaton (Cutler-Hammer), Siemens, ABB, Schneider Electric, General Electric, Square D, Mitsubishi Electric, Fuji Electric, and Noark and more! 

Welcome to Electrical Supplies Unlimited (ESU Inc), your trusted partner in the electrical supply industry for over four decades. Established 40 years ago, ESU has consistently delivered top-notch electrical products and services, earning a reputation for reliability and excellence. Our commitment to quality has made us the go-to choice for electricians in San Diego who rely on our extensive inventory of premium electrical supplies.

We have a large inventory of most brands of circuit breakers. We carry a large variety of manufacturers, including Eaton, Zinsco, Federal Pacific FPE, Pushmatic, Bulldog, Cutler, Hammer, ITE Siemens, Square D etc. in our San Diego store.  We are circuit breakers and electrical hardware experts. Do not hesitate to call us at 858.558.2850 to find out which Circuit Breaker is right for your requirement.

Electrical Supplies Unlimited is your company's business source for testing, repairing, rebuilding or reconditioning electrical equipment. ESU maintains a wide variety of out of stock circuit breakers, relays, transformers, switches, relays, motor controls, and other electrical equipment. ESU will also purchase your excess electrical inventory. We also buy new and used transformers. Call us today to find out more! Some merchandise may be available as used or surplus, just call one of our representatives to find out more!

ESU has been a trusted partner in electrical supplies for over 40 years! As a seasoned industry leader, we pride ourselves on a vast inventory featuring new, surplus, and recycled electrical supplies catering to both commercial and residential markets. At ESU, we specialize in sourcing even the most obsolete and hard-to-find items, ensuring our clients in San Diego have access to the broadest range of products. Our commitment to quality and sustainability sets us apart, making ESU the go-to choice for those seeking reliable electrical solutions. Explore our extensive inventory and experience the assurance that comes with four decades of expertise in delivering top-notch electrical supplies to meet every need.

At ESU Inc, we understand the dynamic nature of the electrical business, and we take pride in adapting to the evolving needs of our customers. Our dedicated team is equipped with the knowledge and experience to provide tailored solutions that meet the unique requirements of electricians in San Diego. In addition to our vast product range, we are excited to announce that ESU is now actively purchasing excess circuit breaker inventory. If you have surplus circuit breakers, trust ESU to offer competitive rates and seamless transactions. Join the growing community of satisfied customers who have made ESU Inc their first choice for all their electrical supply needs in San Diego and beyond.

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and, by interrupting continuity, to immediately discontinue electrical flow. Unlike a fuse, which operates once and then has to be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Circuit breakers are made in varying sizes, from small devices that protect an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.

ESU stocks new and used Electrical Fuses

Our large selection of fuses up to 3000 amp will usually satisfy most requirements for your job. We carry many brands including Buss and Little Fuse among others. Call today and get your fuse requirements fulfilled at Electrical Supplies Unlimited

Welcome to Electrical Supplies Unlimited (ESU Inc), your trusted partner in the electrical supply industry for over four decades. With a rich history spanning 40 years, ESU has been at the forefront of providing top-notch electrical solutions to the vibrant community of electricians in San Diego. Our commitment to excellence and customer satisfaction has made us a go-to destination for professionals seeking reliable electrical supplies.

At ESU Inc, we specialize in the purchase and sale of electrical fuses, ensuring that our inventory meets the highest standards of quality and reliability. Our extensive experience in the industry allows us to curate a comprehensive selection of electrical supplies, catering to the diverse needs of electricians across San Diego. As a seasoned player in the market, ESU combines a legacy of trust with a forward-thinking approach, staying abreast of industry trends to offer cutting-edge solutions. Whether you're a seasoned professional or just starting, ESU Inc is here to empower your projects with the finest electrical supplies, backed by unparalleled expertise and a commitment to excellence that stands the test of time.

An electrical fuse is a current interrupting device which protects an electrical circuit in which it is installed by creating an open circuit condition in response to excessive current.

When the element in a fuse receives too much heat it will melt and interrupt the current. Fuses are usually used as a conduit between an electrical power source and an electrical component or a combination of components arranged in an electrical circuit. A fusible link is connected between the fuse terminals. This means that when an electrical current passing through the fuse goes beyond what the device is able to handle, the fusible link will melt and the circuit opens thus preventing electrical component damage.

Fuses are typically made for single time use. In other words, once it shuts a device down it must be replaced. You can get over-current protection from a variety of sources such as circuit breakers, switches, and relays. Each type of equipment has variations in ratings, service requirements and costs. Fuses are typically the most economical means for providing automatic high-voltage current protection against a single over-current failure.  Contact Electrical Supplies Unlimited for your electrical fuse supply needs.

Commercial Service Electrical Equipment

Electrical Supplies Unlimited can supply most major commercial services from 100a  and up. We are experts in multi-units add-ons and can modify or certify equipment to underwriters laboratory UL specifications through our network of service providers.  Amongst the products we stock or have access to are Siemans ITE, Cutler Hammer, Federal Pacific, GE, Square D, Challenger and others.

ESU is your go-to source for comprehensive electrical supplies. At ESU, we specialize in buying, selling, and stocking a wide range of electrical equipment for commercial services. Whether you're looking for new, surplus, or recycled electrical components, we've got you covered. Our commitment to sustainability is reflected in our recycled inventory, providing cost-effective and eco-friendly solutions. With a focus on quality and reliability, ESU ensures that your commercial electrical needs are met with precision and efficiency. Explore our diverse selection today and experience the seamless synergy of buying, selling, and stocking electrical supplies with ESU – where excellence meets sustainability in every transaction.

Commercial Service Electrical Equipment

Welcome to Electrical Supplies Unlimited (ESU), your trusted destination for a wide range of electrical products and services in San Diego, Orange, and Riverside Counties. With over 40 years of experience serving the community, ESU has established itself as a reliable source for electricians and homeowners alike. We specialize in buying, selling, and stocking new, surplus, and recycled commercial service electrical equipment, catering to the diverse needs of our customers. Whether you're a professional electrician working on a commercial project or a homeowner tackling a DIY electrical task, ESU has you covered with our extensive inventory and expertise. Count on ESU to provide quality products, exceptional service, and competitive pricing to meet all your electrical supply needs.

For over four decades, Electrical Supplies Unlimited (ESU) has been the go-to destination for electrical supplies in San Diego, Orange, and Riverside Counties. As a trusted name in the industry, ESU prides itself on offering a comprehensive range of new, surplus, and recycled electrical commercial service equipment to electricians and homeowners alike. With our extensive experience and commitment to customer satisfaction, ESU has become synonymous with reliability and quality in the region. Whether you're in need of electrical components for a commercial project or home renovation, ESU is your one-stop shop for all things electrical. Trust ESU to deliver top-notch products, unmatched expertise, and personalized service to support your electrical projects every step of the way.

Electrical Safety Switches in San Diego

ESU, your go-to destination for electrical safety switches! As a leading electrical supplies company, ESU stands out by offering a comprehensive range of services. We specialize in buying, selling, and stocking new, surplus, and recycled electrical safety switches. Our commitment to sustainability and cost-effectiveness makes us the preferred choice for businesses looking to enhance safety measures without compromising on quality. Whether you're in need of cutting-edge safety switches for new installations or seeking budget-friendly recycled options, ESU is your reliable partner. Explore our extensive inventory to find the perfect electrical safety solutions that meet your requirements. Trust ESU for excellence in electrical supplies and a commitment to safety that sets us apart in the industry.

We have a large inventory of Safety Switches up to 400 amps 600v in stock both new and used to satisfy your electrical needs. We stock most makes. From  15 amp to 600 amp   240v to 480v single phase and three phase indoor Nema 1  and outdoor Nema 3.

For over four decades, Electrical Supplies Unlimited (ESU) has been the go-to destination for electricians and homeowners across San Diego, Orange, and Riverside Counties. Our extensive inventory of safety switches, ranging from 15 to 600 amps and 240v to 480v, ensures that we have the perfect solution for your electrical needs. Whether you're in search of new, surplus, or recycled safety switches, ESU has you covered with top-quality products that meet industry standards. With indoor Nema 1 and outdoor Nema 3 options available, we provide versatility to suit various applications. Trust ESU to deliver reliable safety switches backed by years of expertise and unmatched customer service.

At Electrical Supplies Unlimited (ESU), we take pride in our longstanding commitment to serving the community with premium electrical solutions. Specializing in safety switches up to 400 amps and 600v, our vast inventory caters to the diverse requirements of electricians and homeowners alike. With over four decades of experience, ESU has established itself as a trusted partner in the industry, offering both new and used safety switches from leading manufacturers. Whether you're in San Diego, Orange, or Riverside Counties, count on ESU to provide you with the safety switches you need to ensure peace of mind and electrical reliability for years to come.