The terminals at the top of a breaker (when installed in a vertical position) are for connection to the source of supply and are called the line connections (NEMA markings L-1, L-2, L-3 or IEC markings 11, 21, 31). The terminals at the bottom of the breaker are for connection to the load (NEMA markings T-1, T-2, T-3, or IEC markings 12,22,32). Most breakers must be installed with the source of supply connecting to the top terminals.

Duval Electrical is master distributor for Jefferson Electric Transformers. We have in stock…..
Single Phase- 240/480  -  120/240

2 KVA, 3 KVA, 5 KVA, 7 1/2 KVA, 10 KVA, 15 KVA, 25 KVA, 37 1/2 KVA, 75 KVA, 100 KVA

Three Phase – 480 – 208/120      or       480 – 240/120

3 KVA, 6 KVA, 9 KVA, 15 KVA, 30 KVA, 45 KVA, 75 KVA, 112 1/2 KVA, 150 KVA

* Weather shields available at no charge.

Duval Electrical provides 24 Hour Emergency Service!! In order to better service your emergency service needs we have put into effect an emergency number (904) 292-7425. This number is primarily for shut down situations involving power sources such as circuit breakers, transformers, fuses, disconnect switches and other related items.

We make it easy for you to pay your invoice by using your Visa, Mastercard, American Express or Discover Card. You can use your charge card at our sales counter or by calling us at 904-262-6601 with your credit card information.