The tag has no usage guidance.

learn more… | top users | synonyms

1
vote
1answer
31 views

Unswitched hot in Fixture Junction Box

A comment on an answer to this question seems to be saying that its illegal for an unswitched hot to run through a light fixture junction box, even though its not connected to the fixture at that ...
1
vote
2answers
59 views

Do I need USA-color-coded wire on fixtures with flexible cable?

I often obtain lighting fixtures with flexible cords (but no plug) intended to be fed into a box and spliced. (e.g. this LED flood light). They are made in China for a world market, and have Euro ...
0
votes
1answer
27 views

Michigan Kitchen Sink Electrical Requirements

Wondering what the NEC code requirements are for Residential Kitchen outlets. I was told that the two wall outlets on either side of the kitchen sink have to be on separate circuits. The kitchen in my ...
0
votes
1answer
28 views

Electrical Disconnects for condensing unit

What year did the NEC code require electrical disconnects to be installed at HVAC condensing unit?
0
votes
0answers
32 views

Partially Finished Basement. Do I need electric on concrete walls?

In my basement the inner walls are finished with paneling, and have electric. The outer walls are just painted concrete block, no electric. By code, should the outer walls have outlets every x feet ...
3
votes
1answer
52 views

Non-metallic conduit support on horizontal surface in inaccessible space

NEC says I need to secure 1" nonmetallic rigid conduit (Schedule 40 PVC to be precise) every 3 feet, which makes perfect sense when it is hanging between supports horizontally, across joists, or on a ...
3
votes
2answers
140 views

Is this type of ground wire connection NEC compliant?

Found this recently, done by a licensed electrical company in the state of California. Is this compliant? If not, is there anything that could be added to make it legal? (I see "ground clamps" for ...
0
votes
1answer
75 views

Can a cord and plug attached to a wallbox be used as a transfer means for fixed wiring downstream of the box?

So, we have a circuit that runs from the panel to junction box A, then to junction box B, and then onwards to a load. Can the fixed Chapter 3 wiring between junction box A and B be replaced by a ...
1
vote
1answer
105 views

What are the rules for making your own conduit KOs in nonmetallic junction boxes?

Some North American electrical boxes (usually nonmetallic ones) lack conduit knockouts, as they are designed solely to clamp NM cable. Unfortunately, some devices (the RIB series of enclosed, UL ...
1
vote
1answer
72 views

Is there anything that forbids an Article 409 industrial control panel within a dwelling unit?

Can an "industrial control panel", complying with NEC Article 409 and constructed with UL 508 listed devices, be used to control loads in a dwelling unit/residential occupancy? It would rely on the ...
1
vote
1answer
71 views

PVC conduit crossing a wire run

I have a garage which was wired up by an electrician to be my workshop. There are several runs of electrical cable (including one 60A, 220V circuit) running along the ceiling of the garage. They are ...
3
votes
2answers
80 views

Is rodent damage considered “physical damage” under the NEC?

Does the potential for rodents to access/gnaw on a cable under normal circumstances render it subject to "physical damage" in the sense the NEC intends that term to be used?
4
votes
2answers
520 views

Ok to conceal electrical junction box under cabinet behind removable toe-kick

There is a 5 or 6 inch gap between the floor and the bottom of my kitchen cabinets. I have ikea cabinets so the toe kick is connected to the cabinet legs by plastic clips. It comes off just by pulling ...
1
vote
4answers
125 views

“Local Amendments” to the NEC - What is meant by this term?

I recently encountered the term "Local Amendments" in responses written by Tester101 and Ed Beal. I would like to know what they meant by this.
1
vote
1answer
45 views

Are existing non-tamper-resistant outlets grandfathered in NEC?

My residence is a town home built in the late '90s, thus having non-tamper-resistant outlets. I assume that they are grandfathered in NEC? Am I required, by NEC, to install tamper-resistant when ...
0
votes
0answers
58 views

Runnig urd /use-2 in conduit in to a house?

Putting a 100 amp sub panel in a barn. Ran 2-2-2-4 al ser across house basement from 200 amp main panel. Ran urd use-2 under ground from barn to exterior house wall. Can I run urd/use-2 in conduit to ...
0
votes
1answer
70 views

Does this j-box follow NEC electrical code?

I'm considering buying the following product for a security floodlight install: Arlington 8141-1 Vertical Siding Lamp Mounting Kit with Built-in Box for 1/2 Inch Vertical Siding LAP. It seems to get ...
1
vote
1answer
135 views

Is a plug adapter considered an “extension cord” under the NEC?

Is an adapter from a plug (say a NEMA 14-50) to a different socket (say a NEMA 6-20 or L14-20, or even a NEMA 6-50 for that matter) considered an extension cord by the 2014 NEC? If it isn't, then what ...
0
votes
1answer
65 views

Should exterior receptacles be on a separate circuit from interior receptacles?

For some reason, I thought I remembered reading in the 2011 or 2014 NEC that exterior receptacles/lights need to be on a separate branch circuit than one powering interior receptacles/lights, but now ...
0
votes
0answers
38 views

run data cable for outlet inside box?

I'd like to run a data communication cable through all of the outlets, light fixtures and switches in a house. (I already have the walls open for other reasons.) Think something like a hardwired X10, ...
3
votes
2answers
224 views

What to do with the wires when removing baseboard heaters

I recently put in a forced-air whole house HVAC system in my old house. I'll be yanking the old electrical baseboard heaters from everywhere in the house soon. I'm wondering what all would be ...
4
votes
1answer
269 views

Installing a new 240v receptacle - what do I need to know?

Provided I use a box large enough to meet the fill requirements (and use 10 AWG conductors), are there any additional requirements I should be aware of when installing a new 240v 30 amp receptacle for ...
0
votes
3answers
488 views

Under Nec 2011, I need neutral to every switch box; can I just use 2 14/2's instead of paying extra for 14-2-2?

I have two deadend 3way switches planned for the box (on the same breaker). I have 14/3 for each one going on, but then learned of the new rule about needing neutral at every box. I thought to replace ...
1
vote
1answer
88 views

Safe way to terminate exposed electrical during remodel?

I have a few exposed electrical wires that were cut in order to remove wiring in the area being remodeled. Is there a safe alternative to terminating all these points inside boxes? I need them safely ...
3
votes
1answer
229 views

How many circuits are recommended for this basement game room remodel?

Ok so this paint photo is roughly what I want to do to my basement. The lights are 6 inch recessed lights. The fireplace blower was on the old 15 amp circuit so I dont see a problem there. It ...
2
votes
2answers
193 views

Do electricians often/frequently interchange the color on the grounded leg when wiring switches?

A recent comment on this question said that it was not unusual to see the grounded leg of a switched circuit being used as the switched leg, there was some agreement. This seems a terrifying problem ...
2
votes
3answers
431 views

What's the difference between “physical damage” and “severe physical damage” in the NEC?

The 2014 NEC uses "physical damage" at various points to refer to well, hard knocks, if you know what I mean. However, certain passages in the NEC, such as 358.12 point 1 on EMT: Where, during ...
1
vote
0answers
83 views

Independent circuits on a common trip CB

Is it permissible under the 2014 NEC to feed two independent 120VAC branch circuits from a common trip (aka double pole) circuit breaker? The circuits do not share a neutral wire, and are ordinary ...
1
vote
1answer
217 views

Does the NEC limit the maximum size of junction boxes?

In this question, the OP has constructed a large junction box out of several extension boxes attached to a "regular" junction box: Is there any upper limit on the size of a junction box (either ...
1
vote
0answers
398 views

Coast 3-way — does this conform with Code?

For those who aren't familiar, the California or Coast 3-way switching arrangement is a method of wiring a three-way switch circuit that is used when both a switched and an unswitched hot are desired ...
3
votes
1answer
172 views

Listed electric baseboard heaters that permit installation below outlets

Are there UL-listed electric baseboard heaters that do permit being installed below outlets? The FPN in 210.52: Informational Note: Listed baseboard heaters include instructions that may not ...
3
votes
1answer
1k views

When replacing non-grounding type receptacles is a GFCI receptacle required, or can any GFCI device be used?

Under the NEC (it was 210(7)(d)(3), but appears to have moved around some), it is permissible to replace an ungrounded receptacle with a GFCI receptacle, then wire further ungrounded or non-grounded ...
1
vote
2answers
575 views

How do I properly place devices in an electrical enclosure?

I have to put together an electrical enclosure that includes, some terminal blocks, fuses, a power supply (110-24V,3.2A) all of which will be used to provide power for a series of sensors and ...
4
votes
1answer
461 views

Conduit Underground - Ways for tunneling under obstructions?

I'm running into a situation where it's increasingly difficult to bury this PVC underground 18" in some spots due to massive tree roots. Changing directions and/or destroying the roots isn't an ...
3
votes
1answer
455 views

NEC, use more extension boxes or an access panel?

What is the maximum number of extension boxes you can hang from a ceiling? This is ridiculous and I probably need one or two more to meet the new drywall ceiling. Are junction boxes permitted behind ...
1
vote
1answer
223 views

Code compliance with 120/240v outlet

I am updating the electrical in my garage. Right now, it has two GFCI 120v outlets, one on the outdoor outlets circuit and the other on the garage opener circuit. I am looking to add locking 240v ...
3
votes
1answer
593 views

Does the circuit providing a light at the electrical panel have to be ONLY for that light?

Does the circuit providing a light at the electrical panel have to be ONLY for that light? I'm fairly sure there specifically has to be a light at the panel, as well as a circuit with an accessible ...
1
vote
3answers
9k views

How many lighting circuits are needed in the LED era…? (US - NEC)

This is in a two story, ~1000square foot per floor building. With the advent of affordable, decent (IMHO) LED fixtures (finally!) the entire lighting load for the structure looks to be 500W - 1000W at ...
2
votes
2answers
9k views

Is it okay to staple romex to a floor joist when running it perpendicular behind a finished basement ceiling?

Taking down my ceiling to run some wire to new outlets. The outlets are going in an area with an unfinished ceiling, so I know the romex there will need to be ran through the joists when going ...
5
votes
2answers
2k views

How are equipment grounding conductors counted for determining conduit or junction box fill?

Suppose one is doing junction box fill calculations for a typical NM-B installation such as the one shown below for a switch box with one normal and one three-way switch. Which of the wires count ...
-2
votes
1answer
383 views

Residential electrical installation, at what voltage is a licensed contractor required?

I'm trying to figure out regulatory requirements for residential electrical installations. Specifically, when is a licensed electrician required by code to perform an installation? Obviously you don't ...
2
votes
2answers
2k views

NEC Definition of “Maintained Spacing” for Wire in Free Air

This seems like a simple question, but I cannot seem to find the answer in the 2008 NEC. There are references to "maintaining spacing" in many sections of the code such as the following: ...
6
votes
1answer
16k views

Is there a length limit on grounding conductor to ground rod?

My service panel is over a concrete patio, it was improperly grounded in the crawlspace. I cannot drive a proper ground rod in the crawlspace so I would like to drive one into the earth on the side ...
4
votes
1answer
6k views

How many ground rods are required for panel and subpanel?

I have a main service panel with two breakers: the main service breaker and a single large breaker to another subpanel in the same structure. All other circuits are serviced from the subpanel. My ...