Electrical Services — Part 2
Looking at Fig. 230.1 in the NEC, we can see that the second and third major areas of Art. 230 provide requirements for service entrance conductors (Part
Stumped by the Code?
Q. What are the requirements for supporting communications raceways and cables above a suspended ceiling?
Top 2008 NEC Changes
The bonding rules for reducing voltage gradients around permanently installed pools, outdoor spas, or outdoor hot tubs were changed again. Here's a summary of the entire section. (A) Performance. Equipotential bonding is intended to reduce voltage ...
Code Q&A
Q. What are the AFCI protection requirements for dwelling units, and do these requirements apply to smoke alarms?
Code Q&A
Q. Does the code require GFCI-type receptacles anywhere, or can you use GFCI breakers for all required GFCI locations?
Electrical Services — Part 1
If you look at Fig. 230.1 in the NEC, you'll see that Art. 230 divides neatly into three general of coverage. The first includes general requirements,
Code Q&A
Q. In our local high school science lab, receptacles have been installed within 4 in. from the edge of a sink. Is this acceptable per the Code?
Code Q&A
Q. Where does the Code address which way the grounding terminal of a receptacle goes (up or down)?
How Much Working Space Is Enough?
In order to create safe working conditions, OSHA and the NEC provide working space requirements that vary according to the hazards involved with
Stumped by the Code?
Q. What are the NEC requirements on the use of the white wire for the ungrounded conductor?
Code Q&A
Q. Can a junction box contain both 277V and 120V conductors?
Code Q&A
Q. We had a new swimming pool installed at our house, and the electricians ran a cable to the pool equipment room panel. Is this legal?
Stumped by the Code?
Q. Is GFCI protection required for receptacles above the counter of a break room in an office building?
Code Q&A
Q. Can a 45 kVA transformer be installed in the ceiling space above the ceiling grid?
