16,526 reputation
13881
bio website gregmaclellan.com
location Canada
age 32
visits member for 3 years, 9 months
seen 5 hours ago

Professional software developer, with several years working on industrial control and monitoring systems. Slowly remodeling parts of my house.


Aug
22
comment Why does my fan switch sometimes turn the lights off?
@Cthos: You marked an answer, what ended up being the actual problem?
Aug
19
comment Why does my fan switch sometimes turn the lights off?
@Cthos: I see a bunch of neutral wires in the back? Anyway, for testing purposes, you can use ground instead of neutral. (neutral and ground are bonded at your panel, which is why this works. Note though, NEVER use ground in place of neutral in wiring -- it is a code violation, fire risk, and a shock hazard).
Aug
19
comment Why does my fan switch sometimes turn the lights off?
Cthos- Ah, okay, then what you're measuring is incorrect. You're measuring a difference coming through somewhere else that my brain is not in the right mode to figure out right now. What you should be measuring is the voltage between "to light" and neutral, or "to fan" and neutral -- though I don't think that will help in this situation anyway.
Aug
19
comment Why does my fan switch sometimes turn the lights off?
Where is the 83v and 12v measurements coming from (what two contacts)? Also, it looks like "power to fan" and "power to dimmer" marettes are redundant - there is just a small pigtail going to the incoming power line. Lose the pigtails, just use one marette - less to go wrong, and more space in the box.
Aug
18
comment Waterproof seal between two submersed pipes
Is the pipe pressurized (above 14psi, which is approx the pressure the outside of the pipe will have from being submerged 30ft), and if so, at what pressure? What is inside the pipe (I'm guessing wiring, but could be water, effluent,...)? How bad is it if the seal breaks, and water does get in (eg, do you want to really over-engineer this seal and have backups)?
Aug
18
comment Do I need a moisture barrier between my bedroom and attic?
Interesting, though long, article explaining vapor barriers: buildingscience.com/documents/digests/…
Aug
18
comment Do I need a moisture barrier between my bedroom and attic?
@Karl: my opinion: that's too hard to get right, and the wax paper is just not as good as 6-mil plastic. If you don't get it right, and you end up with mold in your insulation or walls (possibly years later), the repair cost easily trumps the small extra amount of money and time to just do it right in the first place (install 6mil plastic).
Aug
17
comment Why does my fan switch sometimes turn the lights off?
It would be useful to see all the wires, labelled with where they're going. I'm tempted right now to say that probably the dimmer is sensitive to electrical noise generated by the fan motor or switch, but without seeing the full wiring diagram I can't rule out a cross connection between something.
Aug
15
comment Why does my bathroom exhaust fan drip during the summer?
I recently installed a vent in my bathroom, and though the line slopes down anyways (so any water will drip outside anyways), the vent itself has molded styrofoam inside, and a large ball in a channel that acts as a damper. When air is blowing, the ball lifts up slightly and lets air out. When it stops, gravity pulls the ball back down and it completely blocks the pipe. I've only had it in for a couple months, but it seems to me a much more reliable design than the typical plastic flappers that have air gaps and are easily blocked or held open if any debris gets in/on them.
Aug
15
comment What is the purpose of tape when taping and mudding drywall?
Any links to back up using multiple layers of tape? I have never heard of it, never seen pro drywallers do it (in person or on TV) and can't find any references online to it. The typical method is single layer of tape (paper or mesh, mesh becoming more accepted and I've heard many pros say it's definitely better on butt joints, if not everything), and then 3 thin layers of mud, with pros generally preferring to mix their own, usually using sheetrock 90.
Aug
15
comment Why does my water pressure drop after using my water hose for a few minutes?
Why the downvote? If I'm wrong about something, please comment.
Aug
15
comment Why does my bathroom exhaust fan drip during the summer?
Where is the drip coming from, as far as you can see? (a pic may help). Is it possible it's water getting in through the vent outside? Does it happen all the time, or only when the outside humidity is high?
Aug
12
comment Besides insulation and air conditioning unit, what else is there to check if my A/C isn't keeping me cool?
I'd agree with these points, plus look for drafts. Get your own infrared thermometer (you can find them for ~$30) and look for hot spots - which will help find where the sun is heating up, or hot air is getting in.
Aug
11
comment Glass rod joining/welding: temperature instead of glueing?
According to wikipedia, MAPP burns at 3,670 °F (2,020 °C) which is in the range of what it takes to melt glass (according to @woodchips), and so it may work depending on the type of glass. It's worth a shot, since it's reasonably cheap and a MAPP torch is useful for other things anyways, like copper plumbing.
Aug
10
comment What is the best way to calculate the angle at which crown moulding should be cut?
The video linked shows a mitered corner, not how to cope it.
Aug
3
comment Connecting a P-trap to a female drain connector in the wall
Good point - unfortunately though, that's what was already in the wall and probably has been there for 30+ years. The only way to change that though is to take down all the drywall, cut the existing pipe back and re-run, and then patch it all up. I'm really trying to avoid that for something so simple.
Aug
2
comment How was this subfloor cleaned?
There's no noticeable difference in height. Turns out the white stuff is actually a layer on top of the adhesive - see edit.
Aug
1
comment Connecting a P-trap to a female drain connector in the wall
My biggest issue is the lack of a drain in the P-trap. This means if something gets dropped down the drain, there's no retrieving it without taking apart plumbing.
Aug
1
comment GFCI buzzing on same circuit as dimmer
It sounds like either a bad connection (which should be fixed immediately, as it's a fire hazard), or a faulty GFCI (which also should be fixed - faulty is not a good quality in safety devices).
Jul
28
comment What internet-connected home security system options exist?
This is a complete monitoring/install service that does everything for you. Kind of goes against the whole do-it-yourself theme of this site.