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macgyvers2000

AFCIs in workshop

11 years ago

Building out the workshop (currently unfinished basement, but I'm working on it), but things have changed since my last buildup. Barring some VERY minor exceptions, the locals are using 2014 rules.


Quoting the rule:

"All 120-volt, single phase, 15- and 20-ampere branch circuits
supplying outlets or devices installed in dwelling unit kitchens, family
rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, or similar rooms or areas..."


The "similar rooms/areas" verbiage is a bit too vague for my purposes. I believe I don't have to worry about the 240V branches that will be there for the major equipment, but the remaining 120V branches for the smaller, hand-held tools are... do they need to be on AFCIs, or can I get away with standard breakers since the area is obviously meant for a workshop (saws, lathes, etc.)?

On a related note, when I finally get around to the wine bar area, does the above rule also apply? I suppose it could be considered a "recreation room" or "similar", but was a bit curious. I'll likely put AFCI in that area regardless just to avoid the hassle.


Thanks!

Comments (7)

  • 11 years ago

    Wine bar - probably so.

    Shop - I wouldn't. Motors on power tools arc and spark a lot, especially when loaded down, and you'll get a lot of AFCI trips. I would make them GFCIs, though.

  • 11 years ago

    I agree with Randy. The bar area is probably going to be considered living space (I'd love to hear about your wine bar...I have a 3000+ bottle cellar and am building a general bar area to house my 16 bottle cruvinet wine dispensor).

    The local AHJ made me put GFCI in my shop because it's part of an accessory structure but I can't imagine the AFCI rules could be perverted to extend to there. Randy is right, AFCI would be a PITA.

  • 11 years ago

    Thanks, guys. The trips from motors was my main impetus for checking. My heavy stuff is obviously all 240V, so no worries there, but some of the handtools and such could be problematic. I'll drop a 100A subpanel on the wall of the shop and build out from there. Out of curiosity, do they even make 240V AFCI for residential boxes? I've seen industrial, but no residential.


    Ron, everything is still in the planning stages. Moved into the house almost a year ago. Unfinished basement is around 2,200 square feet. I have a hack of 10' and roughly half a hack of 8' 2x4s for stud walls, waiting on time (and friend's trailer!) to get some 3/4" plywood for fire breaks. Having a Ravelli RC-120 pellet stove installed down there in the next week or two for a little extra warmth (and to stop wasting $600/month on propane during the cold months like last year).

    I'm still deciding on the best way in which to break up the area into useable spaces... the workshop was easiest to decide upon (it already had the sump pit, the main floor HVAC, water heater, etc.). The sump pit will be blocked off and the dust collector will go on top, so no lost space there. The HVAC will be moved towards the middle of the basement and that area walled off, so it's out of my hair in the shop. Likely move the water heater in there, too.

    The wine bar will work nicely in the area beneath the "great room" on the main floor. There's a setback in the wall the fireplace above sits on, so I'm thinking "immediate access bottles" in that spot, with a wet bar extending on either side. Turning 180 away from the wall, I'm thinking a standard bar/cabinets and the like. Left and right will be glass-walled wine racks. Granted, I'm not sure if I truly have the space for what I want, but this is the first house where I think something like this will truly add to the overall design rather than pricing it out of the neighborhood ;-)

    Don't even get me started on the wet bar and double-sided fireplace SWMBO desires in the master bedroom :-p

    Maybe one day I'll draw up a quick sketch of the layout and let people throw ideas out.

  • 11 years ago

    Beware that if you use VFDs (variable frequency drives) on three-phase motors in your shop they are incompatible with most GFCIs, generating enough electrical noise on the supply side to trip GFI outlets. I can only imagine that AFCI would be be even worse.

  • 11 years ago

    Most VFD devices tend to be fed with 240 which while it might be GFCI protected, the code doesn't mandate it.


  • 11 years ago

    That's true, and in a shop I'd certainly wire them that way.

    It's a problem I wrestle with all the time because I use a Baldor 120V VFD to drive a blower on my trailer-mounted organ and have to plug in to whatever outlet is available when I'm traveling. Spend way too much time and hassle with popping GFIs, so it tends to be top of mind for me.

  • 11 years ago

    Cool...I actually owned a pipe organ for a while but it had a giant kinetic blower on it.