For questions relating to compliance with laws and ordinances of federal, state/province and local jurisdictions. Questions should also be tagged with the specific area of construction involved.

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2
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1answer
249 views

How to reroute a circuit that goes through a return air plenum

Old house, need to replace a wire where the insulation has been stripped off from when the original installer pulled it through a joist. Normally I'd just follow the original path of the old wire, ...
2
votes
2answers
805 views

What are the code requirements for installing a ceiling fan alongside a fire sprinkler?

I have a fire sprinkler in my bedroom ceiling which is right in the middle. I want to install a ceiling fan. What are code requirements to follow?
2
votes
2answers
2k views

What do I need to know before taking the home owner's electrical test?

Inspector came over and checked out my basement today. He suggested that I take the `local home owner's electrical test to sign off on that part of the permit. They give you the NEC 2008 handbook, ...
2
votes
1answer
846 views

Can I run an unrelated electrical cable under a bathtub?

I have an older house with a mixture of grounded and ungrounded outlets. Every room has at least one grounded outlet in it, except one. I've long wanted to run a new cable to that room and at least ...
2
votes
2answers
2k views

What is the difference between MSS SP-80 Type 1 and Type 2?

I have a bronze gate valve whose spec sheet says it conforms to MSS SP-80 Type 2. However, the project standards specify that the gate valve must be MSS SP-80 Type 1. What is the difference between ...
2
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2answers
7k views

Can I extend the ground/bus bar in a main service to accomodate subpanel equipment ground?

I am about to replace the main service breaker panel in my house. The old panel (a 200amp Siemens 40-circuit) had bus bars that extended the entire vertical length of the box. The new panel I would ...
2
votes
1answer
233 views

Is Kitchen cooktop venting required?

I'm replacing an electric cooktop with downdraft ventilation. Does building code require that I keep this ventilation, or can it be removed?
2
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2answers
192 views

Is there a way to extend electrical wire where the splices can be finished over?

I want to extend some wires to relocate some switches. Normally one might do this by splicing new wires in and covering the junction box with a cover plate. Is there a way to permanently splice wires ...
2
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2answers
2k views

When there are multiple circuits in a junction box do all grounds get connected

If I have a junction box where there are splices from several circuits, do I connect all ground wires from all circuits together in one bundle or do I do that for each circuit within the junction box? ...
2
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0answers
45 views

Is it ok by code to enclose a residentail breaker box in a finished basement as long as there is an access door and what are the requirements? [duplicate]

I am finishing a basement and want to enclose the 200a service box and wiring with a framed cabinet of some sort. Is there any requirements for clearances and what you can enclose it with? I am in ...
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2answers
5k views

Can I mix 12 gauge and 14 gauge wire in the same 15 amp circuit?

I have 12/3 wire from a switch to 3 light fixtures; can I feed the switch with 14/2 wire from a 15 amp breaker?
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2answers
328 views

Can a white (or other color) wire be remarked to serve as a grounding conductor?

In a question related to plugging in a device with a 6-20P Plug (240V Ground + 2 Hots) into a 10-30R (120/240V Neutral + 2 Hots) receptacle, I suggested replacing the outlet with a 6-20R and using ...
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3answers
411 views

Electrical receptacle inside kitchen cupboard? (California code)

Is an electrical receptacle allowed inside a kitchen cupboard by the California Electrical Code? (i.e. installed so that the receptacle face plate is on the inside back panel of the the cupboard, so ...
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2answers
130 views

is a permit required for changing old outlets

Do I need a permit to change old outlets out that are cracked or not working and replace them with new ones Thanks
1
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2answers
98 views

Running LV conduit through attic - what do I need to know?

I want to run 1" LV conduit (Carlon Resi-gard) through the attic. Basically, I am using the attic for the "horizontal" run from one room to another. I will be sealing the hole with some caulking, ...
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3answers
3k views

How do I determine the fill rating of a conduit?

I Will be installing a subpanel in a detached garage. The subpanel will be 60 amp. The garage is about 30' from the main-panel in-house, and I will of course get an exact length before selecting the ...
1
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1answer
818 views

Do smoke detectors have to be hard wired in New Jersey?

I'm rebuilding after a fire, and I need to know if the new smoke/co detectors need to be hard wired.
1
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1answer
72 views

California code requirements for electrical panel placement height

I'm trying to get some wires to reach the bottom of my electrical panel. How high off the floor can I put my panel and still meet code requirements... or what section of which code can I find this? ...
1
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1answer
216 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
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3answers
3k views

Can I drill a 3 1/2" hole through 5 joists?

I need to move a toilet to the other side of room approx. 6 ft I will have to drill a 3.5 in hole for the waste line in 5 floor joist on the second floor. Can I double them and still drill the 3.5 in ...
1
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2answers
153 views

For planning interior walls, should I get an architect or interior designer or someone else?

I am thinking of adding interior walls to divide up a large space (a walk-up basement). But I am clueless regarding building codes and I don't know where I can and cannot put walls. I've read a ...
1
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2answers
2k views

gas line location for natural gas clothes dryer

In the US, what are the usual code requirements governing where you can put a gas clothes dryer relative to the gas line, and governing length and clearance for the flexible gas line between wall and ...
1
vote
1answer
2k views

Is there a required spacing between where high and low voltage lines attach to a house?

If both the high and low voltage lines are strung from the pole to the house, is there a minimum spacing required between where they anchor to the structure? The AC lines enter through the ...
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2answers
66 views

european outlets in an american building

I have seen european outlets in industrial equipment made in europe but installed in the united states (often with a 480/240v step down transformer), and I have come across a couple people who want ...
1
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1answer
56 views

Finished basement outlets, GFCI or AFCI?

I am finishing a basement and I am not sure if I need to install GFCI or AFCI outlets. Is it better to use a GFCI/AFCI breaker instead of the outlets? NOTE: the finished basement will be used as a ...
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3answers
82 views

NEC 6/12 rule clarification

I understand that you must have an electrical receptacle 6 feet from any obstruction or break in the wall, such as a doorway, and no more than 12 feet from the previous electrical receptacle. Does ...
1
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1answer
54 views

Is there anything in the NEC that would prevent me from attaching MC cable with ground to EMT with a compression coupling?

Is there anything in the NEC that would prevent me from attaching MC cable with ground to EMT with a compression coupling? I will be skinning the MC cable roughly about 10 to 15 feet where it enters ...
1
vote
1answer
153 views

Convert a switched receptacle to a non switched receptacle

This is a code question and I live in the US. Some background. My house originally had no overhead lights except for the bathrooms, kitchen and hallways. The rest of the rooms had just one switched ...
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2answers
249 views

would a bathroom without a gfci outlet be a violation in a rented appartment

Would a bathroom without a GFCI outlet in a rented appartment be a violation? I have section 8 and my apartment failed inspection because of this.
1
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1answer
175 views

Can you wire a 30A 2P standard circuit breaker “downstream” from a 60A GFCI 2p circuit breaker?

Will this still provide GFCI protection? Is this against code? Does this represent a hazard? I have a subpanel with a 60A GFCI circuit breaker, that I want to use that to feed to 2 30a 240v ...
1
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1answer
121 views

Are licensed electricians required to perform code-compliant repairs?

A California licensed electrician replaced a circuit breaker for a friend. He removed the living room AFCI breaker and replaced it with a used non-AFCI breaker. When I heard this I was upset enough ...
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3answers
2k views

Is a plywood backer required for all breaker panels?

I read online that a plywood backer may or may not be required behind a breaker panel, and that it must be painted black. What are the rules for this? And why must it be painted black? I'm in MI, USA ...
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2answers
150 views

Is an electrical blank (or anything you have to screw off) an acceptable access panel?

Never installed an access panel that wasn't a lid or door. If we have to screw it off is it code for an access panel? See other question for example: What can I use for a very small access panel?
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2answers
245 views

Is it code to have electrical wire going no where?

I have a wall open in the center of my house. I am going to run some 14-2 up it and and to about 5 feet from my panel, leaving plenty of extra wire to hook up in a few months. On the other end I am ...
1
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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 ...
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2answers
130 views

Are all of these wirings code-acceptable for 3-way switching overhead lights?

So, i have a single switch by the garage door controlling the overhead lights like so: and i would like to add a switch by the other door (shown) and wire it for 3-way control of the lights. I'm ...
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1answer
102 views

Does a contract to build a deck need an occupancy clause?

I am replacing an exterior deck. I've had several contractors out to give quotes, accepted an estimate from one, and am now in the position of signing (or not) a contract for the work. It's a lump sum ...
1
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1answer
86 views

Will roof work done by unlicensed volunteers pass code? [closed]

I go to a church in Chicago that needs a new roof for one of their facilities. For my own home, I can sign a Certificate of Responsibility where it is my job to insure that all the work is up to code, ...
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3answers
2k views

Concrete Footing or Concrete Blocks For Footings

I'm thinking of building a new deck at my new home that I just moved into. It's going to be a two level one. The highest level will be about 3 feet high. I'm not worried about code because its not ...
1
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1answer
122 views

Code compliance for outdoor 20 amp receptacle?

Looking to add a 20 amp receptacle on the outside of my house, on a separate circuit. I don't know what NEC codes to look out for. It will be on the outside wall of the house, if that helps. The code ...
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2answers
164 views

Testing and proper breakers for a multi wire branch circuit?

How do you determine if an outlet is part of a unidentified multi-wire branch circuit? Also, does code say MWBCs need to be on double throw circuit breakers and is it permissible to link CBs with that ...
1
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3answers
332 views

Do I need a permit to renovate a porch in NYC?

I want to renovate my 2nd floor porch, but I don't know if NYC requires a permit. My house was built in 1901, and I believe a CO is not needed because of the grandfather clause. But if I make any ...
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2answers
565 views

Am I required to have a doorknob lock on my exterior door?

I have both a deadbolt and a doorknob lock on my door (actually, all three of my doors). I've noticed that this is a consistent pattern at most houses and apartments that I've visited in my area (I ...
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1answer
4k views

How to determine what type and gauge of wire should used for underground wiring to a detached subpanel?

I Will be installing a subpanel in a detached garage. The subpanel will be 60 amp. The garage is about 30' from the main-panel in-house, and I will of course get an exact length before selecting the ...
1
vote
2answers
271 views

What's the proper procedure for replacing ungrounded circuits?

I have a house that has several ungrounded circuits that uses the older 2 wire romex (pvc insulation, black woven jacket). I'd love to have AFCI protected circuits for the bedrooms, and grounded ...
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2answers
24k views

Can I use these post brackets to attach railing posts on top of decking?

I found a Simpson strong tie product (BC40Z) 4x4 half post base, and it states its intended use is for attaching a 4x4 railing post securely on top of wooden decking. The following picture ...
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1answer
2k views

How do I find out if Air Admittance Valves (AAVs) are allowed in my municipality? [closed]

I saw Richard Trethewey of Ask This Old House install an AAV as part of a kitchen island sink system. I thought I might be able to use one for the water line for my washing machine. I'd like to ...
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1answer
49 views

Is it typical that smoke detectors in adjacent apartments be linked?

I rent the downstairs apt of what used to be a garage. There is one other unit located on the second floor. My smoke alarm was going off frequently without my knowing why. Landlord finally told me ...
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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 ...
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1answer
134 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 ...