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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4
votes
1answer
495 views

What should I do about old cables that have been damaged?

I was replacing some drywall and noticed the wiring underneath has a couple of surface tears. House is from the sixties, but has been rewired with new Romex, except this circuit. Wire seems to be old ...
3
votes
2answers
282 views

Is it acceptable to splice a circuit in two opposite directions for outdoor recepts/lighting?

Per the 2011 NEC, is it acceptable to... Splice a circuit (using a junction box indoors) as long as I leave it exposed, use the correct wire connectors, and have it covered? Use this run one side ...
1
vote
2answers
93 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
vote
2answers
494 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 ...
-2
votes
1answer
165 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
1answer
151 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, ...
1
vote
1answer
193 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.
6
votes
1answer
801 views

How can I replace 2-prong receptacles in a code compliant way?

I have some 2-prong non-grounding type receptacles, and I'd like to replace them with 3-prong grounding type receptacles. According to National Electrical Code, what are my options?
1
vote
2answers
153 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 ...
1
vote
0answers
223 views

When did fire-rated Type X drywall become code? [closed]

I have 1/2" drywall in my attached garage. There is living space above it so current code would say to use 5/8" Type X fire-rated drywall. My house was built in 1977 so I was wondering when the ...
6
votes
1answer
2k views

How many cables are you allowed to run through a single hole in a wooden floor joist?

How many cables are you allowed to run through a single hole in a wooden floor joist? For example, could I run five 12-2 cables through a 1-1/8" hole? I know they physically fit, but is there a code ...
1
vote
0answers
113 views

Can a water heater be installed overhead?

Sorry for the long preamble: I'm doing a remodel which involves building a new attached garage. At the same time, I'm replacing the water heater because it is ancient. I have considered a ...
5
votes
2answers
4k views

Can I wire a refrigerator and dishwasher on the same circuit?

Can I wire a refrigerator and dishwasher on the same 20 amp circuit?
3
votes
2answers
2k views

Can I terminate a ground wire to the neutral bus if the ground bus is full?

I have a Crouse-Hinds main load center. The ground bus is at the top left of panel and the neutral bus is at the bottom right of the panel. I want to add a 15 amp circuit for two outlets in my ...
1
vote
2answers
1k 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?
9
votes
5answers
3k views

Why won't HVAC supply stores sell directly to the public?

I am quite shocked that every store in my very large metropolitan area that sells HVAC supplies requires purchasers to have HVAC contractors license. Which makes it very difficult for a very ...
2
votes
1answer
225 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?
1
vote
2answers
133 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?
2
votes
3answers
442 views

Any problem with installing two identical circuit breakers in series?

Suppose I want to reduce risk of a circuit breaker malfunctioning and failing to disconnect a shorted circuit. What if I install two identical breakers sequentially (one after another) so that if one ...
3
votes
2answers
245 views

Does NEC allow for recessed lighting to be placed in a vertical wall?

I am about to start running electrical in my bathroom remodel and I am considering options for lighting. I have a wall on one side that has 5.75" of space (this was for recessed shelving in an ...
1
vote
2answers
11k 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 ...
0
votes
2answers
165 views

Are electrical subpanels safe in the bedroom?

If not, how do you correct it, or can it be moved without making too much work?
1
vote
2answers
191 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 ...
5
votes
2answers
2k views

How do you secure electrical outlets in a concrete block wall?

I have an old home that has several outlets in the exterior wall. These outlets are not secured to the block, they just dangle in the opening and are only secure (or appear to be firmly in place) due ...
1
vote
0answers
94 views

Can I attach a metal box for a vanity light to a wood cross?

I am redoing a new bathroom. I have a metal electrical box that I want to replace (because it is an odd size from the 50s). The current one is simply screwed to a wood cross (2x4) running ...
3
votes
2answers
2k views

In what year did venting bathroom exhaust out of the house become a code requirement?

what was the year for code for vented bathroom exhaust fan? What is the code for vented bathroom exhaust fan?
2
votes
1answer
371 views

What is the maximum number of connections to pipes?

Does anyone have a table of the maximum number of connections that drain/vent pipes can have for a given size?
0
votes
2answers
206 views

According to NEC 2008 can you use non-metallic boxes in framing that transports environment air?

In the Home Owner's electrical test, the term "environmental air" is used. What does this term mean, and where is it defined? and can you use a non-metallic box? Also when reading the question do ...
2
votes
2answers
537 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, ...
1
vote
1answer
723 views

Can I connect the generator neutral to my mains neutral permanently?

I have a 3 phase 15KW generator with four wires. I want to use it as a standby generator for my house. My house uses 1 phase 220 volts on two wires (no ground as the house is quite old). I have a 3 ...
2
votes
2answers
415 views

What type of wiring should bedroom overhead lighting have?

On the phone with a friend in Cali this morning. He said that some municipalities are requiring /4 (12-3 or 14-3 romex) wiring for all new construction or rewiring for overhead lighting components. ...
3
votes
1answer
185 views

How can I find out if a vapor barrier is requried for finishing a basement to code?

I'm planning out a basement finishing project, and I'd like to do it correctly. I've done a lot of research but what I can't tell is if I do, or do not, require a vapor barrier. I was hoping from a ...
2
votes
3answers
258 views

Is it safe/compliant for one circuit to supply grounded wall outlets in both a kitchen and a living room?

On one side of my wall (in kitchen, not the refrigerator or stove plug) is a three prong grounded outlet. Would it work without overloading a circuit to put a new outlet on the other side of the wall ...
2
votes
1answer
407 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
1k 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 ...
1
vote
0answers
133 views

Where can we recycle washing machine and kitchen sink drain water?

I would like to know the best place or method to recycle drain water from the kitchen and washing machine. Can we use it for gardening (as it contains soap and oil)? Or it can be added to a Biogas ...
18
votes
4answers
2k views

Is it OK that the frame of my house doesn't line up with the slab?

My new house is being framed. I saw that the frame extends 1-2" from the foundation: Click photograph for full size The builder told me it happens often and the city inspector will catch it if this ...
5
votes
2answers
11k views

How do I properly ground my subpanel that only has one neutral/ground bar?

I am adding a sub panel in an unattached building. My sub panel has the connection for the 2 hot wires coming from the source panel (a 40 amp double breaker) In addition it has one neutral/ground bar ...
1
vote
2answers
2k views

Can I install lights on a 20 amp circuit that has receptacles already wired?

I have never been able to ask the following question and get a simple straight answer and would like to know why there is a controversy, and what the answer really is. The question: Can a 20 amp 12 ...
6
votes
2answers
178 views

Do exterior duplex electrical receptacles have to be on multiwire branch circuits?

I have an exterior receptacle on my house, and it is currently taking up 2 circuits (similar to kitchen counter plugs). Is there any code/regulation that indicates exterior receptacles must be on ...
5
votes
1answer
283 views

What is “workmanlike manner”?

I have to ask this because I have been doing a ton of electrical work in my house. Will get inspected soon. I am pretty neat - everything is stapled uniformly and ran at the same height- but I ...
1
vote
4answers
4k views

Should galvanized steel pipe be used as a tub spout?

I have a 90 degree fitting coming down from my shower valve. Also have a screw on tub spout trim. Right now there is a 6" galvanized pipe that connects the 90 to the tub spout trim. Is the ...
6
votes
1answer
4k views

How can I mount an 12V transformer for LED lighting inside a wall?

The stairs to my basement has one light fixture at the bottom, and that casts a shadow on the rest of the stairs. I want to run a strip of LED lights up the crown molding or on top of the upstairs ...
3
votes
2answers
5k views

Does it matter if I mix neutrals and grounds in the main panel?

Code question here. I do a lot of electrical and like to follow code exactly. I have done pretty much everything but hook up lines to main box. Taking a stab at it this time. First I see that I ...
1
vote
3answers
683 views

What NEC requirements apply to installing receptacle next to a tree?

I will install a receptacle next to a tree. I know it must be protected by a GFCI and weatherproof. But my concern is about how to support it and how high it should be from the ground. Where in ...
3
votes
1answer
457 views

How do I string a low voltage wire between two buildings?

I need to get Cat6A to an outbuilding for network communication; underground is not an option. I think I have an idea on the method: grounded pillars with a guyline and the outdoor cable. What NEC ...
6
votes
1answer
11k views

How can I attach a ledger board to my house?

Spring is here so I finally started to take measurements for materials I will need to build a new deck on my recently constructed home. I just realized that this isn't going to be quite so simple as I ...
3
votes
1answer
104 views

Does code require the gas line to be replaced when replacing a furnace?

I replaced my 45 year old (still working) original furnace with an American Standard furnace about 5 1/2 years ago. Now I have a gas leak; the Nicor technician sealed a connection in the gas pipe ...
2
votes
2answers
3k 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 ...
1
vote
2answers
8k views

What is code for installing a dishwasher in the U.S.?

I will be replacing my dishwasher and I am curious what is the current code for the wiring of the dishwasher.