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Electrical Code - CANADIAN 2002 Version - Commercial or Residential for CANADA

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  #1   IP: 24.68.122.59
Old March 26th, 2008, 11:01 AM
renoguy renoguy is offline
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Default Aluminum wire for sub feed?

hey, great forum, this is my first post,
I am installing a suite and want to put in a 100 amp sub panel (electric baseboards) off the present 200 amp main. Knight says use #3 copper for the 100 amp feed but someone suggested I use aluminum since it is so much cheaper, what gauge do I use? I thought it was two sizes up which would make it #1, is this right? What is the proper use of the antioxidant paste?
Thanks
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  #2   IP: 206.116.219.121
Old March 27th, 2008, 07:04 AM
Striker Striker is offline
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Quote:
Originally Posted by renoguy View Post
hey, great forum, this is my first post,
I am installing a suite and want to put in a 100 amp sub panel (electric baseboards) off the present 200 amp main. Knight says use #3 copper for the 100 amp feed but someone suggested I use aluminum since it is so much cheaper, what gauge do I use? I thought it was two sizes up which would make it #1, is this right? What is the proper use of the antioxidant paste?
Thanks
#1 is the right size for a sub panel.
When using aluminum cable be sure to coat any bare aluminum with anti oxidant immediately after stripping. I usually take the cap off the bottle and dip the conductor inside to get a good coating on it. Then tighten the lugs and re-tighten them a day later.

Joe
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  #3   IP: 207.200.116.13
Old March 30th, 2008, 07:49 AM
gary123 gary123 is offline
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as far as the wire size,aluminum will have to be bigger,it does not have the same current ratng as copper. It has a lower current rating and will not handle the load
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  #4   IP: 76.104.172.149
Old March 30th, 2008, 02:44 PM
suemarkp suemarkp is offline
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And #1 aluminum is bigger than #3 copper. Generally, its a two numerical size increase when going from copper to aluminum.
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