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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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35 views

Over spanned rafters - can I fix by doubling up 2x4s to make 4x4s?

I am selling my home and when the buyers had the attic inspected, they reported that the rafters are over spanned. I'm wondering what approach to take to fix the problem. I looked at code here, ...
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2answers
213 views

Relabeling 6-AWG Wire

I'm pulling 2 hots, 1 neutral and 1 ground through conduit to a subpanel and I was wondering if it's possible to use the same color wire and just relabel the endings. I was thinking of using 6 AWG ...
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0answers
29 views

unique ? about venting tankless water header

I am installing a tankless water heater at the house. My question is unique because I can not find a reference anywhere in the code and the installation manual about where to place my exhaust vent. I ...
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1answer
36 views

At what height should underground electrical conduit enter the structure?

When installing an underground electrical line from the house to the garage,how high up off the ground do the access holes that go into the house & garage need to be? The purpose of this ...
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4answers
2k views

Do the quick connectors in my new bathroom fan need to be in a junction box?

I recently replaced a bathroom extractor fan. The new model uses "quick connect" electrical connectors, where I stick the house wiring into this little plastic device, and apparently that's all! The ...
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2answers
89 views

Can I install a new dishwasher or are there code changes

I’m getting a new dishwasher with the intention of directly replacing my existing one from 15+ years ago. However I’m seeing conflicting descriptions of what is up to code, so I’m hoping someone can ...
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0answers
34 views

Smallish sections of rotted OSB - any option besides the nuclear one?

We moved into a new house a few months ago, and recently noticed a water leak during rain. Long story short, the leak has been dripping into an exterior wall, likely for years, and some of the OSB has ...
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1answer
52 views

What kind of roof flashing is this and is it up to code?

This is in NJ. Roof was recently done and I've never seen this anywhere else. Looks like aluminum screwed in on both sides and the front. It's a very steep pitch. Either 10/12 or 12/12. Any idea what ...
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1answer
80 views

I'm wondering if these two things were allowed by the electrical Code in 1981 in California

My wife an I bought a house built in 1981 located in Lake County California. I've been switching out receptacles and switches and found some "interesting" wiring. Now, these all look like "as built" ...
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3answers
79 views

Garage remodel: can I leave garage door in and put an insulated wall in front?

doing a garage remodel and wondering how best to keep the garage door on facade and still be able to have A/C in the garage? I live in hot and humid south Texas. Is this a ridiculous solution to ...
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0answers
32 views

Can I put in a vented bathroom fan in my condo

I just purchased a condo in Myrtle Beach, SC - it is the first time I have owned a condo versus a house. While exploring, I found that the bathroom fans don't vent outside, they just circulate the air ...
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1answer
89 views

What needs to be done to protect existing 12/2 cable in a stud wall being converted to a mass wall?

I'm working on plans to convert three bays of a 2x4 stud wall with drywall into a mass wall by adding material to the cavity. The material will be something like sand/clay/gravel (to be determined ...
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1answer
42 views

Run conduit from exterior sconce

We have a sconce on the outside of our brick house on a covered patio currently. I would like to run conduit from it to allow us to place an exterior fan on the same covered porch. My questions: 1) ...
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0answers
48 views

Are these bends in the tub drain going to be an issue?

Im getting ready to run the drain for my basement bathroom but I'm concerned that I have too many turns in the tub drain. I had to start in the wrong direction in order to pick up a wall for a vent. ...
0
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1answer
37 views

What is required clearance from mechanical exhaust to garage door?

I'm looking to add a new tankless water heater, which allows for pvc exhaust. In California, USA, I think clearance requirements for a door is four feet horizontally or one foot vertically. Does this ...
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1answer
89 views

Some odd wiring in my breaker box. Is this up to code?

I'm poking around in my breaker box and I notice a white wire screwed into the ground bus. Tracing it back, both bare and white are on the ground bus and the black is screwed into a breaker. Is this ...
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1answer
39 views

Is there a building code for shower tile? (CA)

The folks at Lowe's told me not to place tile on top of tile, but it seems like the shower in the home I just bought has 2 layers of tiles. Is there a code for that? Or just a "suggestion" not to have ...
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1answer
47 views

What is the stainless steel baseboard in a walk-in cooler/freezer? [closed]

Trying to identify this base molding that I want to match in a walk-in cooler at a supermarket. It is missing from a few sections of the cooler and needs to be installed. Is this anything special, ...
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1answer
57 views

How can I mount a one gang box to a pipe?

I would like to mount a single gang box to a pipe and stay code compliant. I have a 1-1/2" pipe (but that can be changed), and I would like to have an outlet on the side of the pipe for mounting a ...
2
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1answer
42 views

NEC 210.70 and old wall sconces

I'm planning a diy rewiring of my 1914 2 story. All the upstairs bedrooms (3) have wall sconces with small switches in the fixtures. These sconces are the only light fixtures in the room. The ...
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2answers
87 views

Staying electric code compliant while cleaning up in-wall network box

Below is a pic of the in-wall network box in my new home - it is a 42" On-Q metal box, with an existing power outlet inside. Not shown are the bundle of cat5e cables and network and phone switches I ...
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2answers
142 views

Code: How can a transfer switch not switch neutrals?

I'm looking at this Reliance Controls transfer switch. I certainly won't buy it and don't recommend one, but the huge hank of wires going from switch to panel only has one neutral wire in it. How ...
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1answer
62 views

Are louvered bedroom doors allowed by code?

I'd like to build new rail and stile type interior bedroom doors with slats installed in the panel openings. This would be for improved air flow. This story on ABC ("Closing your bedroom door at night ...
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3answers
87 views

Ganged Circuit Breaker has strange ganging configuration. 40-[30-30]-40

I have a scenario where the Circuit Breakers for a Dryer and a Range are intertwined in the CB panel. In the picture below 17 and 20 are ganged together with that wild ganging clip. 18 and 19 both ...
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2answers
66 views

Required protection for copper gas line passing through metal opening in fireplace casing (Alberta, Canada)

Background context: As executor, I'm in the process of selling my late father's house. I have an offer pending; following the home inspection, the prospective buyers have submitted a list of ...
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0answers
46 views

Waterproofing outdoor wire splices and receptacles

It seems that the NEC requires wire splices to be UL486D listed when used in outdoor (generally damp or wet) locations, similar to the requirement for THWN or other wet-rated wiring. Why are special ...
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1answer
110 views

Is it within code to run ent conduit into a junction box on the exterior of the home?

I am in the construction process for a new home. I asked the Low Voltage Contractor to run conduit to about 13 places inside the house. In addition to that I asked for a run to the exterior of the ...
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1answer
93 views

Diagonal Bracing Requirements

I'm currently designing a deck to replace an existing deck on my home. The new deck is subject to different codes than when the original was built. The city provides a link to a design guide which I ...
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2answers
245 views

Do I need to protect all wiring in an attic when adding a permanent ladder?

I am wanting to add a permanent attic ladder to create storage space in a big attic. There is already exposed wiring in a few places in the attic. If I add a permanent ladder, does that then mean that ...
2
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1answer
72 views

If I replace my main panel, will I need to fit AFCIs?

Code is NEC 2017. My existing main panel has plenty of ampacity but few spaces, and thus, is totally full. I have several potential paths for an upgrade. One involves fitting a subpanel and ...
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3answers
72 views

Can I splice the common wire of two different circuits in the same junction?

I have a single 4way run that shares a 2 gang box with another circuit. Both circuits run off of the same sub-panel. Is phase an issue here? I can't seem to find anything that indicates whether or ...
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1answer
81 views

Is any depth change allowed on electrical panel wall?

I know the NEC requires clear space in front of a breaker panel. What depth of wall change would violate this? My basement, where the panel is, has a 6" jut where the block wall becomes timber. So ...
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1answer
71 views

Are these joists to code?

I am resurfacing my deck and have applied for a county permit to do the work (therefore it will be inspected). I have a protrusion at my house to support a chimney. The size of the protrusion is ...
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2answers
52 views

Am I allowed to put a wall standard within 18" of a fire sprinkler?

From my understanding, in San Francisco, CA, there is a code requirement that you cannot obstruct an area within 18 inches of a fire sprinkler. What is meant by obstruction? Say, you installed one of ...
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2answers
52 views

Does the NEC regulate data cable bury depth?

Technically my jurisdiction follows the 2016 California Electric Code, but it's mostly just the 2016 NEC. Table 300.5 lists bury depths for various areas and wiring methods. Do these apply to data ...
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1answer
43 views

How do I couple IMC underground?

The title, more or less, sums it up. I plan to bury some THHN/THWN-2 feeders, and my jurisdiction allows a 6" bury depth if I use IMC or RMC. I plan to use IMC, which comes with both a male and female ...
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0answers
44 views

What is the correct type of anchor bolt for attaching a sill plate to a slab once the concrete is dry?

If you need to install additional anchor bolts after the concrete has cured (and thus can no longer install traditional J bolts), what is the correct type of fastener that can be installed into dry ...
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4answers
89 views

Gas-fired water heater safe to have in living area of home?

A un-licensed renovation on our house was performed about 15 years ago, which turned a former garage into a 200 sq ft den directly attached to the rest of the house. In this den is a gas-fired water ...
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3answers
139 views

Is a Garage considered a 'Dwelling' for standalone electric service?

I just wrapped up adding new overhead 100 amp service for my parent's garage outside Chicago. My Mom is a retired ceramics teacher and wanted a 30A two phase kiln and/or welder in there and the ...
0
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1answer
37 views

Can I carve a portion out of the side of a floor joist to accommodate a Fernco Clamp

I am tying a pvc sanitary tee into a 3" copper DWV line which runs along a floor joist (2x12) in the ceiling of my basement. I plan on using a fernco shielded coupler 3007-33 (https://www.fernco.com/...
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1answer
98 views

Do you need a special type of screw to mount a NEMA 3R box?

I need to mount a NEMA 3R Meter base and panel on a temp pole. There are screw knockouts on the back of the panels, but is there something that needs to be done to stop water from coming in the screw ...
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1answer
68 views

Suggestion installing receptacles on basement wall?

I plan to install four 20 amp duplex receptacles on a basement concrete wall in area marked by red rectangle (see picture). Along the top of wall is a plumbing drain pipe. Suggestions for installing ...
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3answers
152 views

Suggestions for properly mounting 4' shop light

Suggestions for installing two 4 ft LED flush mount shop lights in unfinished basement ceiling perpendicular to floor joists (see pictures)? Specifically, what ceiling box to use and would you mount ...
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4answers
436 views

Space requirements for first subpanel and wiring preference

I would like to install two subpanels and my main panel is full of breakers. Would it be better to feed both subpanels directly from main or have 1st subpanel off main and 2nd subpanel off 1st ...
3
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2answers
67 views

Upgrading electrical when re-doing siding & code question

I'm thinking about re-siding a house within a next year or two. It is 2-unit house, 3 floors. The third floor outlets do not have ground. Can electric wires be ran under the siding? Is this common and/...
2
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1answer
107 views

Bring portable generator in through automatic transfer switch

I currently have a portable generator, an inlet, and an interlock on the main panel to backfeed the panel. I am moving over to an automatic transfer switch with a standby generator. However, as a ...
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3answers
698 views

Is a dedicated circuit to gas furnace always required?

USA NEC 2014. Is there any way to dodge the requirement for a dedicated circuit for a gas furnace? I need to hang one more small hardwired load right near the furnace, and would rather not run a ...
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0answers
30 views

Can I open a bulkhead open to two unfinished spaces with a finished space between?

I have crawlspace on two sides of a finished den, with the den sandwiched between them. Can I finish a bulkhead through the den but open to the crawlspace on both sides to simplify utility passage ...
6
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1answer
180 views

Bathroom Layout - Code Questions

I have a half bath that is 5' 2" x 7' 3" (measured from drywall to drywall) that I'm hoping to add a shower to. I know that it will be tight, and I'm ok with that, but I'm trying to figure out if I ...
4
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3answers
792 views

Are splices required in a junction box?

If I have a conduit with 6 wires (3 separate circuits), and I want them to split at some point, can I send the conduit (A) to a 4-inch square junction box and then send 2 wires to leave the junction ...