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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1answer
4k views

What are the codes for electrical wiring in attics?

What is the typical code for wiring in attics? I understand these vary but what's best practice? Can you just have electrical wires exposed with all the junctions, in junction boxes, provided all the ...
2
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2answers
234 views

Is it code to have a concrete floor in a bedroom? [closed]

For some reason I recall that it is Ohio Building code that a bedroom must have a floor finish material other than subfloor. So if you are in a Slab on Grade (SOG) condo, does the code require you to ...
2
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1answer
30 views

How high of a structure can I build for growing hops

I would like to grow hops for home brewing and can't find any information on how high of an agricultural structure I can build without a permit, the people I am getting the rhizomes from say ...
2
votes
1answer
167 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
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2answers
322 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
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2answers
724 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
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1answer
485 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
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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 ...
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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
43 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
2k 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
168 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
885 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
252 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
72 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
814 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
99 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
745 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
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1answer
947 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 ...
1
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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 ...
1
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1answer
58 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
160 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
85 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
92 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
77 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
654 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
196 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
11k 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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1answer
70 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
149 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
49 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
84 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
96 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
200 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 ...
1
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1answer
2k 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
181 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
136 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
13k 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
6k 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 ...
1
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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 ...
1
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1answer
50 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
82 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
69 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 ...
1
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1answer
292 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 ...
1
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1answer
853 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
825 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
31 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
58 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 ...