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Is ground or neutral considered a current carrying conductor
Is ground or neutral considered a current carrying conductor when considering conduit fill derate (NEC 2014 table 310.15(B)(3)(a)). For example, if I have 3 phases, a neutral, and a ground conductor i… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,414 satisfied customers
I am in arizona installing a 200 amp panel in a new location
i am in arizona installing a 200 amp panel in a new location against the wall on the outside of the house. i would like to pipe from the new panel location, into the attic and splice to the old wires … read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,414 satisfied customers
My question involves a 1" conduit 20' with 7 pairs of #14
my question involves a 1" conduit 20' with 7 pairs of #14 sis/xhhw rated Insulted (14 conductors) terminated at 120 v shunt trip units 7 breakers to fire alarm relays. … read more
Steve G.
Steve G.
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801 satisfied customers
I have the revised 2002 edition. My question: page 67: ampacities
I have the revised 2002 edition. My question: page 67: ampacities of not more than 3 conductors in a raceway. The 14,12,and 10 readings have an asterick stating much lower max amps than it says in the… read more
AssuredElectrical
AssuredElectrical
Master Electrician
High School or GED
3,264 satisfied customers
I need THWN-2 AWG 12 wire. Per the Code, this wire has 90
I need THWN-2 AWG 12 wire. Per the Code, this wire has 90 degree celcius capacity in wet locations with a 30 amp ampacity. I am running 8 current carrying conductors in a conduit, which means the ampa… read more
AssuredElectrical
AssuredElectrical
Master Electrician
High School or GED
3,264 satisfied customers
IF I HAVE 25 #10AWG IN A 2" CONDUIT(RACEWAY), WITH DERATING
IF I HAVE 25 #10AWG IN A 2" CONDUIT(RACEWAY), WITH DERATING FACTURE, HOW MANY #10AWG CONDUCTORS I'M I ALLOWED?… read more
AssuredElectrical
AssuredElectrical
Master Electrician
High School or GED
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Can I use 1/0 THHN for a 200 amp service? The 2014 NEC states
Can I use 1/0 THHN for a 200 amp service? The 2014 NEC states that the service entrance conductors cane be calculated @ 83% of the service rating. Had trouble with your page. I am trying to put in an … read more
AssuredElectrical
AssuredElectrical
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High School or GED
3,264 satisfied customers
310.15()(7)(1) 83% of the service equipment (meter, main,
310.15(B)(7)(1) 83% of the service equipment (meter, main, load center) rating, or 83% of the load calculation?… read more
AssuredElectrical
AssuredElectrical
Master Electrician
High School or GED
3,264 satisfied customers
Conduit fill question: Outdoor rigid conduit; one inch; contains
Conduit fill question: Outdoor rigid conduit; one inch; contains four #10 stranded; can I pull three additional #10 stranded to bring existing circuit up to code and add an additional circuit?… read more
electrifier
electrifier
Master Electrician
Bachelor's Degree
1,458 satisfied customers
I have 1.5 emt conduit with 28 # XXXXX is this a code violation
I have 1.5 emt conduit with 28 # XXXXX is this a code violation of CEC 310.15(B) (2) (a) and what does the CEC stand for, I'm use to comforimg to the NEC Code or quick reference Ugly's Book which say … read more
AssuredElectrical
AssuredElectrical
Master Electrician
High School or GED
3,264 satisfied customers
Ive been using 8/3 NMB to energize 50A 125/250V ranges for
I've been using 8/3 NMB to energize 50A 125/250V ranges for years. I am being told by others in another part of the country that I should be using 6/3 NMB. I haven't seen any exceptions in the N.E.C. … read more
Mike
Mike
Master Electrician
Working on MBA
1,426 satisfied customers
We have a request to install 4000 MSB in Electrical Room in
We have a request to install 4000 MSB in Electrical Room in existing building. We need to run conduit underground from NEW Transformer will be located at outside. Then we can't cut the floor of electr… read more
electrifier
electrifier
Master Electrician
Bachelor's Degree
1,458 satisfied customers
At what point do you use the derating factor for current carrying
At what point do you use the derating factor for current carrying conductors in conduit for circuiting… read more
electrifier
electrifier
Master Electrician
Bachelor's Degree
1,458 satisfied customers
Mogie, here is my issue. I have a 1 1/4 EMT condiut inside
Mogie, here is my issue. I have a 1 1/4 EMT condiut inside a building running about 90feet long with the allowable number of wires per this conduit size. I have an inspector telling me I have to run 1… read more
No. 1 Sparky
No. 1 Sparky
Vocational, Technical or Trade Scho
18 satisfied customers
I have three A/C units (Lennox TGA240S2BS1G) 20 ton units
I have three A/C units (Lennox TGA240S2BS1G) 20 ton units (460V 52 AMP peak on startup) that were recently installed using 8AWG MC wire with 40 AMP circuit breaker. Longest run is about 250 feet. The … read more
No. 1 Sparky
No. 1 Sparky
Vocational, Technical or Trade Scho
18 satisfied customers
Hi! I am trying to resolve the problem and can not find in
Hi! I am trying to resolve the problem and can not find in the NEC the 310-16 Note 8. The problem is: what is the alowable ampacity of #3 AWG, THHN copper conductors installed in a raceway given that … read more
High-Voltage
High-Voltage
Journeyman Certified Electrician
148 satisfied customers
can i use the 90 degree C rating of a conductor for lighting
can i use the 90 degree C rating of a conductor for lighting when calculating the ampacity of derated conductors for a multiple conductor circuit?… read more
Mike
Mike
Master Electrician
Working on MBA
1,426 satisfied customers
When calculating derating factors for lighting loads what do
When calculating derating factors for lighting loads what do you use for the starting point. The ampacity of the wire eg: 15 Amps or the actual load of the circuit eg: 9 lights at 87 VA each? The sena… read more
electrifier
electrifier
Master Electrician
Bachelor's Degree
1,458 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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