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giacomo.gasparini
Hi, in a multiple-conductors cable the load is unbalanced among the conductors: which wires should be considered "current-carrying" conductors?   E.g.: a jacketed cable with 7 identical wires; for the specific application 4 wires are "power" wires (each loaded with 8A), the other 3 wires are "signal" wires (loaded with <100mA current). The… (Show more)
in Electrical
mrdennispthomas
I recently conducted an inspection on a commercial building with a flat roof with a roof top HVAC system which required an electrical receptacle.  The electrician mounted the receptacle on the roof decking in a metal box face up.  It was GFCI protected.  It did have an X-tra Duty in use cover but it was face up.  I can not find anywhere in Section… (Show more)
in Electrical
chiefns830
I have a contractor who wants to use a manual xfer switch as the service disconnect.  Are there any issues with this?  It is SUSE.  It's not something we see done every day, so I'm asking for advice.  This is for a new electrical service for a bank.
in Electrical
jim.oconnor
Because of the placement of AN, and SR in Table 130.7(C)16 Personal Protective Equipment (PPE) I don't understand which Arc-rated clothing and PPE are As Necessary, As Required, or Selection Required.  In PPE Cat 1 what is "Required" versus "As Needed?" 
in Electrical
chiefns830
I don't recommend using it at this point in time:   Electrical Service Grounding Option: The Steel Rebar 'Sticking-Out' Method? | Electrical Contractor Magazine 
in Electrical
fmarshal
I have three fuel dispensing tanks,1 gasoline, 1 diesel and 1 kerosene each 550 gallons next to each other, the electrician just wire the pump motors using plastic conduit. I though under NFPA 70 it needed to be explosion proof?  but can't find that section, any help would be great.   Thanks, Glenn
in Electrical
jrlclemson
I find nothing in NEC regarding derating THHN that is embedded in ceiling foam insulation.  Any ideas whether #12 should be derated?  Thanks.
in Electrical
jimthesafetyman
I can't seem to find anything on this, but...  Is there anywhere in the code that specifies if the ground prong on the receptacle should be in the up or down position?
in Electrical
em1pagej@gmail.com
My organization is looking to replace our old a 40 cal arc flash suits.  Currently all of our suits are of the 1-piece coverall design.  For heat stress concerns, I am interested in replacing them with 2-piece jacket & pant style gear.  However, a concern has been brought up regarding a possible "chimney effect" where the arc flash could rise up… (Show more)
in Electrical
adamskimn
 I installed a GFCI receptacle to replace an ungrounded two prong outlet. The receptacle still reads ungrounded which is expected, however when I push the test button the GFCI will not trip.   Is the device still GFCI protected if there was a ground fault ?
in Electrical
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