Search Results for ‘nec’

Hello everyone, I am kicking around an idea for a DIY project that would require a small, rechargeable, Lithium Ion battery to be installed within a plenum airspace. Since Li-ion batteries have a habit of bursting into flames, it occured to me that I should check to see if there are codes that...

Hi all, I just want to find out when circuits of over 250 volts to ground DONT need ground busing connectors. I know Article 250.97 gives the following exceptions (a) Threadless couplings and connectors for cables withmetal sheaths (b) Two locknuts, on rigid metal conduit or intermediate...

Hi. Does anyone know if the current NEC allows a 0.5A hydronic heat blower in a bathroom to exist on the bathroom's 20A GFCI circuit with the lights+recepticles+ventfan? Certainly an electric heater would need its own circuit, but I can't find any info specifically about hydronic heaters like...

I was recently tasked with feeding an existing parking lot light pole with new conduit and conductors due to a collapsed conduit. The problem is that the other light pole where we want to steal power from has no Equipment Grounding Conductor . Due to the lack of EGC I feel uncomfortable...

I want to ground the terminal of an Ethernet Surge Protector in an approved method. As I see it, this could be done in many ways but NEC 2017 830.100 (D) has me a bit confused about my options. I'm installing a dozen or so security cameras outdoors on a single family home with ethernet entering...

My main panel is mounted outdoors in a very dusty desert environment subject to dust storms. Windblown dust is pretty significant inside the panel and could lead to bad contact on bus bars and increased resistance on the breakers. Advice I've found so far is to shutoff power, clean with a...

I have a utility pole on private property, hundreds of feet in from the property line. Mounted to the pole is the main panel and meter. I want to mount some long distance WiFi gear to the utility pole, powered by 24v PoE (power over ethernet). First, I'm aware that utility poles have their own...

Hello, I'm looking to see if anyone may have experience or an idea of how glamping sites would be specified in the NEC. I can't see to pin down an exact definition to apply to glamping sites. If you're unfamiliar, glamping is luxury camping, geodesic domes, bubbles, tipis, all of which will...

Customer has a dual stage Dyna-Glo 10kw electric garage heater with peak load of 240v/41.66 amps. The manual calls out a max 50amp breaker. Following NEC rules and considering this a continuous load item it would force me to increase by 125% which is 52.075amps this causes two issues: 1) this...

Does anybody have run into any code references NEC-NFPA, API referring requirement for grounding above ground DIESEL storage tanks? I have heard arguments that Diesel being higher flash point does not have issues of fires due to static discharge.

Does NEC allow running multiple 480V 3 Phase Power load conductors in a single conduit instead of running each 3 phase loads conductors in separate conduits?

Hi Everyone, we are working on a very large exterior lighting conversation at an industrial site. Replacing 400W + 1000W HID fixtures w/ new LEDs. The problem is, the existing 40FT+ poles don't have an existing ground wire. To add a ground to these poles would require a $1M+ infrastructure...

Assuming that I'm considering motor power factor, efficiency, altitude correction and all those fancy but critical factors... which current should I consider as input to cable sizing by voltage regulation: 600V or 575V? FLA is defined as the current at full capacity drawn by the motor at rated...

Is there anything in the NEC code applying to this: If i have a board, with mostly low voltage parts, and there are some parts running voltage from the wall, 115v or whatever it may be, how do I separate them according to the NEC code?

Hey all I'm currently at an Electrical training school. Does anyone have any tips or advice for someone that is just getting into the NEC? More specifically things I should get familiar with to get licensed as an electrical contractor in NJ.

Ok guys I have one for you. I have recently had a inspector from the state come to our plant and gig'd me for some violations on flexible cable. I have a hard pipe in my shop that goes to a 6X6 box and changes to a "heavy usage" cable to plug in my welders, plasma cutter and such, 400.10 (6)...

Number of circuits required for the lighting load of an 8000 sq.ft. residence? Any guesses? :thumbsup:

What are the requirements of splicing romex in attics in the NEC. Is it required to be spliced in a box? Please state where it is located in the NEC.

My question is as the title goes. Can I run 50A stove cables and romex throught the dead space underneath cabinets? I've taken on a side job doing some residential stuff and the property manager wants the stove moved from the wall to the center of the kitchen to a sort of bar set up. I'm not...

NEC Table 210.24 allows a 15 amp receptacle to be installed on a 20 amp circuit. How is this ok?