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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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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1answer
59 views

dyeing grey water, standerds for how much dye to use

I am looking into grey water systems for a future house. In the course of researching, I learned that in states that have adopted the International Plumbing Code, you can use the water for flushing ...
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2answers
107 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
81 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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1answer
350 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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1answer
969 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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3answers
1k 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
57 views

When does a sleeve become a conduit, and how much can I fit in a sleeve?

According to National Electrical Code, the conduit percentage fill table does not apply to sections of conduit used to provide protection from physical damage (sleeve). National Electrical Code ...
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0answers
68 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
134 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
72 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
968 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
292 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
159 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
105 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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0answers
138 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
172 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 ...
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0answers
188 views

How can I confirm the building code limitations for adding a small cabin/cottage/office in my county? [closed]

Aptos, CA (Santa Cruz County - California - US). Hi all, I'm considering building an outdoor shed primarily for a multi-purpose home office. I'd like to know to what codes I'll come up against but ...
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2answers
234 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?
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3answers
2k views

2-wire switch loop controlling 2 outlets - replacing with 3-wire to fix?

I am in nearly this exact situation: Can I use a switch loop to power a ceiling fan? We are trying to install a fan, but instead of having a single duplex outlet on the same wall as the switch, we ...
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1answer
266 views

Add new outlet in pantry to one of the two existing 20 amp small appliance branch circuits

I am doing some remodeling in my kitchen. I currently have the required two 20-amp small appliance branch circuits powering the kitchen counter outlets. I have a small pantry/closet directly off the ...
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2answers
38 views

Help with fire code in a condo building

We had a "contractor" come out to bid our project and told me I needed to cut the drywall off one side of our living room wall. (We live on the 15th floor of a condo building in Minneapolis MN.) I did ...
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1answer
57 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 ...
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1answer
43 views

Electrical Code Clarification

I'd liked to get some insights into how others interpret the code regarding AFCI and the NEC 2015 code. Here's a hypothetical: Arc fault protection is omitted for outlets outdoors, garages and crawl ...
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1answer
51 views

Proper wiring for dishwasher and GFCI

Can I connect a dishwasher to a GFCI outlet that is part of a 20amp circuit that has a total of 2 GFCI outlets?
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1answer
93 views

What name could be used in building code for “interior drain tiles”?

I'm searching Chicago building codes for anything about drain tiles to be installed inside a home. http://dev.chicagocode.org/ is the site I'm using. They have a ton of material about the sump pumps, ...
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2answers
163 views

Is it okay to drill a ground rod through pavement?

All the sides of my house are paved, and I need to drive a new ground rod for an antenna. Would it be against code (NEC) to drill a hole in the concrete to pound in a ground rod? Bonus question: How ...
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1answer
261 views

How do I wire a door bell?

Can anyone make an educated guess on how to wire so the door bell rings? The flat used to have door phone entry system, but it doesn't work anymore. So it is used as normal bell. In flat we had a ...
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2answers
313 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 ...
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0answers
25 views

Super-Insulating a Crawlspace

I am getting ready to have a contractor insulate my crawlspace. The exterior facing walls of my crawlspace are about 2" above grade, with the remaining 2 ft 6 in - 2 ft 10 in below grade. One of the ...
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0answers
82 views

Deck diagonal bracing alternatives

The IRC prescriptive deck guide calls for decks taller than 6' to have diagonal bracing placed parallel (planar) to the beam from post to beam. My deck, which is built with a beam on one side and a ...
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0answers
23 views

Does the junction between two horizontal spaces need to be fireblocked?

This question is in regard to interpretation of IRC:2012 R302.11 for a single family dwelling. It is clear that junctions between vertical and horizontal framing need to be fireblocked (e.g. between ...
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149 views

What codes are invovled in running an overhead subpanel feeder to a detached garage?

This subfeeder will be going to a detached garage about 30ft away, and powering a 100amp subpanel. I'm not sure what codes are involved in this feat. I'd like to know the codes involved for ...
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2answers
177 views

New residential toilets all so tall?

Are all new toilets high off the ground? Our existing toilets (one 20-year-old Toto and one ancient 5 GPF monster that I am shopping to replace) are around 14.5" from the floor to the rim of the ...
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2answers
9k views

How to properly ground a subpanel in detached building?

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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0answers
83 views

Replacing drywall above boiler… to Code? Inspection?

I own a mid-1800's house in New England, with a fieldstone foundation and dirt floor basement. I now have a mold problem in the basement. There is lone sheet of drywall above the boiler & water ...
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1answer
273 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 ...