sullyelectric
Member
I have a chiller that needs 500 Amps. It is actually drawing 474 amps. I think i need 750 MCM. IS that right? Also if i was to parallel this would i need 250 MCM?
sullyelectric said:I have a chiller that needs 500 Amps. It is actually drawing 474 amps. I think i need 750 MCM. IS that right? Also if i was to parallel this would i need 250 MCM?
Correct unless it is a continuous load and if you had two runs of 250 kcmil in separate conduits. This is all contingent on what the manufacturer's instructions require.sullyelectric said:. . . I need 750 MCM, IS that right? Also if I was to parallel this would I need 250 MCM?
It is interesting how many times one person is typing while another is posting. One of these days, I will start checking before I pull the trigger on my own posts. Looking at the bright side, Chris and I ended up saying about the same thing.chris kennedy said:Got a link to the chiller specs?
Yet I stand in your shadow.:grin:charlie said:Chris and I ended up saying about the same thing.
sullyelectric said:I have a chiller that needs 500 Amps. It is actually drawing 474 amps. I think i need 750 MCM. IS that right? Also if i was to parallel this would i need 250 MCM?
Yes it does. Let me know where you find one. If you do the terminations on the other end will most likely be 75C rated so your wire is good for 460 amps.sullyelectric said:the min cir ampacity is 474 amps on the nameplate. i think i will be running paralell 4/0 thhn. that should give me 520 amps. does the breaker i am using need to be rated for 90 degree wire?
Jraef said:If you buy a 100% rated breaker (extra cost), they typically come with 90C lugs. Sometimes that is the only difference.
electricalperson said:a lot of lugs i buy now come 90c. maybe someday in the future breakers with 90c lugs will be common