wanting to feed a branch box with a 60a breaker (#6 copper) thru EMT.
This may be a stupid question, but is there anything in the NEC to prohibit
using double #10's to get the amperage?
Reason is I have plenty of (free) #10 on hand and tube capacity is slightly
better with #10's.
i would imagine that the theory is that smaller wire sizes are too easy to
tinker with regarding the clamping hardware at breakers, etc.
If one of the parallel wires became disconnected, there could be a severe
overload on the remaining conductor.
310.4 Conductors in Parallel.
Aluminum, copper-clad aluminum, or copper conductors of size 1/0 AWG and
larger, comprising each phase, neutral, or grounded circuit conductor,
shall be permitted to be connected in parallel (electrically joined at
both ends to form a single conductor). copyright 2002 National Fire
Well we aren\'t no thin blue heroes and yet we aren\'t no blackguards to.
Does it not also say that _each_ conductor must be the same size, and
each capable of carrying the full breaker current?
[Our code does.]
Which basically means you can parallel conductors to reduce end-to-end
resistance (voltage drop), but NOT to increase circuit ampacity.
Chris Lewis, Una confibula non set est
It\'s not just anyone who gets a Starship Cruiser class named after them.
On Tue, 23 Aug 2005 17:39:59 -0000, email@example.com (Chris
No you add the ampacity of paralleled conductors but bear in mind they
must be 1/0 or larger (about 10mm).
The reason you can parallel conductors is to use a size that is more
easily handled in large ampacity circuits.
What code do you operate under?
I can not imagine trying to pull a conductor for a 2000 amp service. We
parallel conductors for load all of the time. It is not practical to use
any conductor larger than 1000 circular mills. I just do not have the sand
in the ass any more to handle wire that big.
Commonly 750 mcm is the largest conductor used where I live.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.