Electrician Talk banner
breaker size
1-8 of 8 Results
  1. NEC Code Forum
    Hello, I am in need of some guidance. I have to get power to two machines that have a nameplate that is, 220v, 43KVA, 3 phase, 125a. I have 480v in the building so the manufacture recommended transformers I bought are, 75 KVA transformer, 480v to 240v, I have changed the taps to get about...
  2. NEC Code Forum
    I've had a few discussions with some "pro's" and there is some dissent. My understanding of national code (all of them) is that the lateral feed to the sub-panel determines it's the breaker size in the main panel AND that it doesn't matter, after that, what size (within reason) the sub-panel...
  3. Services and Service Equipment
    Hi guys; I need to install a sub panel to feed all the dryers and washers in the laundry room for a building. There are 3 washers, 3 dryers, they all need 15A/120V. And then, there are 4 stacked sets which require 20A/120V. They all have to be on dedicated circuits. There is a 200 amp panel...
  4. General Electrical Discussion
    Q1: I have been under the impression that I could not use a 50A breaker with a #8 wire. (Romex, NMB) I usually run 8/3 Romex for ranges and use a 40A breaker. - However, can I use a 50A breaker. - I am thinking no because the range would be considered a continuous load. (Does the NEC state...
  5. General Electrical Discussion
    So I am researching solar systems and installations for a friend of mine who wants to install at his appliance store. It looks like he will need available space for a 40amp load (at least that is what we believe to be necessary for an 8.1kW system) at his electrical box to host this system. We...
  6. General Electrical Discussion
    I have to install a 7 1/2 HP, 3 phases, 230 v. motor compressor. Design B. From 430.250 I found the FLC as 22A. From 310.16 I selected 10 AWG wire for 30 A. From 430.52 I found the breaker not to exceed 60A. If I match the breaker with the wire (30A) I might be too low for the starting current...
  7. Residential Electrical Forum
    Hi all, I am a newly qualified electrician but have no experience in domestic other than installing GPO's and SB testing; however I have scored myself a big job; a brand new domestic installation. I am confident with all aspect's of the job, even purchased the only tool I didn't have to legally...
  8. General Electrical Discussion
    I have a 250 amp, 120/240 volt, single phase panel with 100 amps dedicated to resistive load (heating) at 240 volts and 40 amps to incidental loads at 120 volts. What size 240 volt compressor can I run from this load center?
1-8 of 8 Results
Top