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- Newsgroups: rec.woodworking
- Path: sparky!uunet!spool.mu.edu!uwm.edu!linac!att!att!dptg!ulysses!ulysses!smb
- From: smb@research.att.com (Steven Bellovin)
- Subject: Re: Wiring TS.
- Message-ID: <1993Jan21.211729.4687@ulysses.att.com>
- Date: Thu, 21 Jan 1993 21:17:29 GMT
- References: <1jkcspINN5oc@jethro.Corp.Sun.COM>
- Organization: AT&T Bell Laboratories
- Lines: 36
-
- In article <1jkcspINN5oc@jethro.Corp.Sun.COM>, keith@badseed.Eng.Sun.COM (Keith) writes:
- >
- > During the setup of my Table Saw(haven't finished yet), I've been watching the
- > wiring discussions with some interest, but not much attention to detail. I
- > found the motor to be 1.5 HP and 17.2 amps @ 110V. Now I don't know much about
- > the subject of house wiring, and was wondering if some kind soul could clue me
- > in. I seem to recal that somewhere in normal 110V house wiring there is a 15 amp
- > component(fuse or outlet). This probably means I should rewire for 220V and run
- > a line into my garage from the clothes dryer. Is this reasonable? Or, am I
- > mistaken and can run the saw from a standard receptacle? Also note the outlet
- > is at the farthest point from the breaker box in my house.
-
- OK. The first step, of course, is to read the wiring FAQ. Briefly,
- though, trying to run that saw on a 115V, 15A circuit is iffy -- you're
- liable to pop the breaker simply from the startup current. Second,
- if there's a long wiring run to the outlet, at 14 gauge, you're going
- to see more voltage drop than is desirable. You might be able to get
- away with it, but it's not good for the motor. My Delta contractor's
- saw, which if I recall correctly draws ~14 amps, is supposed to be
- wired to a 20A circuit if configured for 110V, with 12 gauge wire.
- You could probably get away with the same setup, without any problems,
- *if* you had a short run to the breaker box. But you don't.
-
- Yes, 220V is probably the right way to go. But using the dryer's
- circuit isn't good. That circuit is almost certainly 30 amps, and
- you shouldn't plug a saw with 20 amp wiring into a 30 amp circuit.
- (At 220V, your saw will draw ~9 amps in normal operation, but the
- wiring will still handle the 20 amps it's designed for when wired
- for 110V. Amps is amps.) The right way to do things is to run a new
- line. Not knowing your house, I have no idea whether or not that's
- feasible. Also, you probably can't simply add a breaker panel to the
- dryer's wire, because in the U.S. dryers are (stupidly, in my opinion)
- allowed to have a shared ground and neutral.
-
- It might be worth talking over the problem with an electrician, especially
- if you're not experienced in doing wiring.
-