DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   Electrical (http://www.diychatroom.com/f18/)
-   -   wire size for ac/heating forced air unit (http://www.diychatroom.com/f18/wire-size-ac-heating-forced-air-unit-39605/)

macfluke 03-03-2009 11:11 PM

wire size for ac/heating forced air unit
 
My ac/heating forced air unit(220V) has a 50A breaker with two 8g hot leads and one 12g neutral wire with NO ground wire. I saw on a chart that it needs 6g hot leads, and I was wondering what size the neutral wire needs to be? (the 12g looks small for some reason). also... what size the ground wire needs to be?

InPhase277 03-04-2009 12:08 AM

Quote:

Originally Posted by macfluke (Post 239931)
My ac/heating forced air unit(220V) has a 50A breaker with two 8g hot leads and one 12g neutral wire with NO ground wire. I saw on a chart that it needs 6g hot leads, and I was wondering what size the neutral wire needs to be? (the 12g looks small for some reason). also... what size the ground wire needs to be?

If it is 240 V, it doesn't need a neutral. It needs two #6 hots and a #10 ground.

frenchelectrican 03-04-2009 12:29 AM

It must have #6 conductors in there however the major gotcha is if you have standby electric grid heater that can affect the rating if you are under 10 KW you can get by with #6's but if more than that you will need to get proper sized conductors with correct OCPD in there,

Merci,Marc


All times are GMT -5. The time now is 02:56 PM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved