Wiring 15kw heat stips

Status
Not open for further replies.
ok, fair enough...thanks for the concern....im not sure where the amps is drawn from for the motor....the 30 amp circuit or the 60....regardless, ill be careful with this
 
NolaTigaBait said:
....cause if i wire it with a #2-2 aluminum feeder, i can use a 4 circuit can with the 60 and 30 breakers, whereas, if i use two seperate wires, i need two seperate disconnects......right?
Click to expand...
That's how I look at it; I've done it both ways. If the AH has exposed breakers/disco's, you don't need external ones.

I usually base the choice upon the variables you mentioned. Is the panel close enough to eliminate the disco's?

Two pull-outs can cost less than a 4-space box and two 2-poles. Compare parts and labor both ways and decide.

NolaTigaBait said:
sorry yet again...yes romex....60 column is 55 for #6thhn and of course 30 for #10....am i missing something?
Click to expand...
What does the AH nameplate call out for Minimum Circuit Ampacity?

NolaTigaBait said:
yes, this unit has a 30 and a 60 on it already...it has a bonding strap if you choose to run one feeder or you can remove it to use two wires
Click to expand...
If they're exposed with the unit closed, you're okay; just run the 90a single cable. It's worth it in labor savings.
 
Last edited by a moderator:
Modern HVAC equipment comes with MCA and MOP numbers. The supply circuit must meet or exceed the first one, and the breaker cannot exceed the second one.

As long as the first number is 55a or less, and the second one is 60a or more, you can use the #6 NM and 60a breaker.

As I said before, if the unit's breakers are accessible without removing any panels, you do not need to install any additional disconnects.
 
LarryFine said:
Modern HVAC equipment comes with MCA and MOP numbers. The supply circuit must meet or exceed the first one, and the breaker cannot exceed the second one.

As long as the first number is 55a or less, and the second one is 60a or more, you can use the #6 NM and 60a breaker.

As I said before, if the unit's breakers are accessible without removing any panels, you do not need to install any additional disconnects.
Click to expand...

really?....i did not know this.....i thought you had to have a disconnect nomatter what
 
NolaTigaBait said:
Is it ok to run a #6-2 and a #10-2 to the heat strips?, instead of running 1 feeder?....reason why i am asking is that i have just enough #10 and #6 to do the job....and what kind of disconnect should i install if i run 2 wires to the strips?
Click to expand...

you generally cannot run conductors in parallel unless they are 1/0 or bigger.
 
Status
Not open for further replies.
Top