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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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 ...
2
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2answers
4k 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
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1answer
218 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?
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0answers
41 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
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?
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2answers
135 views

Do I need to install carbon monoxide detectors to be up to code?

My home was constructed in 2003 and has a natural gas furnace. Do I need to install carbon monoxide detectors to be up to code? It seems confusing since the first code IRC 315.1 is only for new ...
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3answers
584 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 ...
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1answer
215 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.
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1answer
55 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 ...
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3answers
642 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 ...
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2answers
95 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 ...
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2answers
576 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 ...
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1answer
847 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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1answer
6k views

Are there locations in a residence where a non tamper resistant receptacle can still be used?

Assume for a second that my jurisdiction has adopted 2011 NEC code as legally binding without significant amendment. This code requires (406.11) that 120V 15/20A outlets in all areas defined in NEC ...
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2answers
128 views

Legal water heater replacement

I'm looking to replace my water heater. I currently have a 15 year old 40 gallon gas water heater, and it's time to go. I had several quotes from local plumbers, and choked at the prices. I'm going to ...
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2answers
74 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.
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1answer
80 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 ...
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1answer
76 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
493 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
193 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 ...
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2answers
9k 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.
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2answers
51 views

buried LPG line crossing new electric line: code requirements?

Trenching for 1" Non-Metallic Liquidtight Conduit Type LFNC-B with 18" cover (10-3 W/G UF wire installed, 240V with 30A breaker) to serve a well. Just bumped into LPG line crossing conduit's path at ...
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1answer
67 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
76 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 ...
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1answer
40 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
72 views

Testing and proper breakers for a multi wire branch circit?

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 ...
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3answers
82 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
163 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
1k 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
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2answers
165 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
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?
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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 ...
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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 ...
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4answers
5k 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 ...
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1answer
1k 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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2answers
59 views

How should I run stripped cable through conduits?

I have a 6/3 NM-B cable that is to be run through a Southwire Ultratite conduit to an external outlet for a generator. I plan to strip the cable prior to threading through the conduit: 1. for ease of ...
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2answers
64 views

Does anyone have experience with insulating with waste-wool from shearing?

Does anyone have experience with insulating with waste wool from sheep-shearing. I am interested in washing and deodorizing techniques and also in the packing-density requirements. Plan is to use ...
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3answers
65 views

What are code regulations for stairs off exterior french doors

Do the stair off my frecnh doors need to be the width of both doors or can they be just the width of the most used side?
1
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1answer
260 views

Framing interior non-bearing wall with 24" on center for sound proofing

I'd like to sound proof a few interior walls in my house using the techniques for the 52 STC here (http://www.soundproofingcompany.com/soundproofing-solutions/soundproofing-walls/) which is basically ...
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3answers
737 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 ...
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0answers
52 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 ...
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0answers
54 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 ...
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0answers
55 views

Does this count as a material alteration or repair for code purposes

Ontario Building Code, 2012 Except as provided in Section 3.17. of Division B, Section 9.40. of Division B and Part 11 of Division B, if an existing building is extended or is subject to ...
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2answers
659 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? ...
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0answers
238 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 ...
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0answers
124 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 ...
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0answers
99 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 ...
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1answer
784 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 ...
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0answers
134 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 ...
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0answers
161 views

How do you plug an unused hole as per the NEC for a liquid tight enclosure?

I have been looking for a way to seal a liquid tight product using Listed blanking plugs / Cap-offs or similar to comply with the NEC (US National Electrical Code). We wanted to use Conduit Entry ...