Max #of circuits
- Thread starter johneymac
- Start date
- Status
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Is this a HW or test question? The answer is less than 6 circuits.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
I believe four 2-wire circuits using THHN can be used and still allow 20a on #12 wire.
Applying the adjustment factors to a #12 thhn you could use a 20 ampere overcurrent device and you could have up to 9 current-carrying conductors. However you are not sharing a neutral so in a 3/4" emt or any size emt you would only be able to have 4 120V circuits not sharing a neutral. Which is 8 current carring conductors.
what does HW stand for.
mcclary's electrical
Senior Member
- Location
- VA
To stay within the confines of chaper 9 table one, fill to .213.
cross sectional area of #12 (table five) is .013, so that means you can fit sixteen wires. The pipe is your EGC, so you can have eight single pole circuits. Can you use MWBC? But derating is now an issue, in your case means derating to 50%,,,,which 310.16 thhn #12 is 30 amps. Which leaves you with 8 fifteen amp circuits.
cross sectional area of #12 (table five) is .013, so that means you can fit sixteen wires. The pipe is your EGC, so you can have eight single pole circuits. Can you use MWBC? But derating is now an issue, in your case means derating to 50%,,,,which 310.16 thhn #12 is 30 amps. Which leaves you with 8 fifteen amp circuits.
Pierre C Belarge
Senior Member
- Location
- Westchester County, New York
I say it is strange because derating and CCC questions are parts of most if not all licensing exams, I will admit though, I have never taken the NJ contractors exam.
Roger
B4T
Senior Member
- Location
- Long Island, N.Y.
I hope one of the members of a CMP goes outside and gets some fresh air
The word "luminaries" (lighting fixtures) is the dumbest thing to date IMO
For 100 years it was "fixtures" and now it goes high tech :roll:
The word "luminaries" (lighting fixtures) is the dumbest thing to date IMO
For 100 years it was "fixtures" and now it goes high tech :roll:
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Get used to it. And it's not 'high tech'.
It's French for 'a complete lighting unit'. Would you rather use that?
The NEC, while a US product, is increasingly being adopted in other countries. Language is slowly being introduced to make it easier for other countries to work with.
I guess you're gonna complain about the use of the metric system as well.
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No complaints here. I've worked with both and metric is much more logical. The US needs to join the rest of the world.
B4T
Senior Member
- Location
- Long Island, N.Y.
So "LUMINARIES" is a word other countries use instead of lighting fixtures??
Why is it WE have to change our code to make it easier for them?
Let them pay a translator to write our code in their language
Using the metric system didn't work for road signs and it won't work for electrical work..
Uh, I hate to tell you, but most of the English language is made up of words from OTHER LANGUAGES.
B4T
Senior Member
- Location
- Long Island, N.Y.
And the metric system works just fine for both. Go anywhere outside this country.
my thoughts exactly
Uh, I hate to tell you, but most of the English language is made up of words from OTHER LANGUAGES.
yeah, and we took them and now theyre ours. no givebacks.
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