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  1. U

    GROW ROOM ELECTRICAL

    Just keep it close enough for gov't work. Loads vary all the time. No you don't need to max the third just because A and B are maxed.
  2. U

    Construction and maintanance subforum

    To growroom design and set up. I think it would be more organized if this is added, and those of us in the construction trades would find threads easier. And stickies could be made that may help save a lot of headaches.
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    Black mold in my attic!!!

    I wouldn't leave it unattended, I think you're right to fear that. Def look into getting reimbursed by insurance. Look into it first in case there are some roofs they will reimburse and some they won't in your area. Where did it lift? did it go unnoticed? Was there ice and water shield there?
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    Building new rooms. What wall covering ??

    If you're concerned about moisture with drywall use MR (moisture resistant) it's usually purple. FRP can completely seal off and allow walls to be washed down if desired, if properly installed.
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    Black mold in my attic!!!

    Do you have eave and ridge vents? Did you ever mistakenly block your eave vents with insulation, thinking you were doing a good thing as many home owners do? You should have either a ridge or gable end vents, as well as eave vents. Ideally, ridge and eave vents. With proper vent down into the...
  6. U

    Old room, New problem.

    Never test the socket on a pulse start HID (HPS and PS MH) The ignitor fires between 2500-5000volts to initiate the arc. Once the arc is established the ignitor quits. I'm not sure if you can disconnect the ignitor on a digi to test, but you def need to on a mag in order to test. A regular meter...
  7. U

    DIY silencer for a fan/blower to reduce noise

    Blade design has to do a lot with the noise level (sometimes indicated as "sones") And suspending it with some sort of isolating bushings will be quieter than just mounting on isolators.
  8. U

    ballast cord getting warm

    Stolen from http://lauterbornelectric.com/2011/07/problems-that-we-as-electricians-see-frequently/
  9. U

    ballast cord getting warm

    It is ok to run 15 amp receptacles on a 20 amp breaker. But not the other way around. The plug configuration prevents any device being plugged in from overdrawing. (As long as you don't have unqualified people building or modifying cords, cord caps or equipment) If there is only a single...
  10. U

    Spray insulating a shipping container

    Is rmax insul board? If so, maybe glue directly to the metal and use a t-square to mark the void locations. Drill a 1/4" hole every foot or so up to the top. Then use LOW EXPANSION foam (the stuff made for around doors and windows so it doesn't bow them, there's a huge difference between that...
  11. U

    ballast cord getting warm

    How are you going to know what the load is unless you are constantly monitoring it? A 15 amp receptacle and a 20 amp receptacle look slightly different. That's because the plugs (male end) are slightly different. The neutral side (left when receptacle is ground down) on a 15 amp is vertical...
  12. U

    Spray insulating a shipping container

    Many insulations have a vapor barrier on them. The paper facing is usually a vapor barrier. So when you see it in basements with the paper side down, that's wrong. People should be using unfaced batts for that application. It's cheaper anyway. There really isn't any moisture transfer in...
  13. U

    ballast cord getting warm

    If that were the case, it would be warm along it's entire length. Since it's in the first 3" than it's most lilely one of the causes I already outlined. Either way, you should make sure that recep is good before you plug something else into it.
  14. U

    ballast cord getting warm

    It is. Plus if both circuits were on the same phase than you wouldn't get 240 and you'd be overloading the neutral to boot.
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    ballast cord getting warm

    That's your best bet. And DO NOT replace with a 20 amp receptacle if this is not a 20 amp circuit. Remember what I said about configurations being designed for use? Well a 20 amp plug can plug in to a 20 amp receptacle. If these are on a 15 amp ckt than you can potentially overdraw the circuit...
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    ballast cord getting warm

    Absolutely not. Especially if you do not know 100% what you are doing. If you put 240 to a 120 recep than you could end up plugging a 120 device into it. Like I said earlier, plug configurations are designed for specific use. We have testing and listing organizations as well as codes to ensure...
  17. U

    ballast cord getting warm

    Ballast most likely isn't your cause.
  18. U

    ballast cord getting warm

    OK well than it's either: Backstabbed receptacles, worn receptacles, or other poor connection near receptacles (Most likely one of these.) Undersized cord. Bad molded plug It very well could be the cord. I'd try it on a known good receptacle if not immediately obvious. Plug should fit...
  19. U

    ballast cord getting warm

    That's perfectly legal and fine. This was most likely due to poor connections or backstabbed receptacles. The configuration of the receptacle will only allow plugs that won't overdraw. Assuming we're talking about listed and legal equipment and not shit that some dumbass homeowner built because...
  20. U

    ballast cord getting warm

    PS it's ALWAYS best to individually fuse each ballast according to the voltage/current. It's much better to allow a fuse to pop than an entire ckt to trip. Especially if you have veg lighting or other equipment on that ckt.
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