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- From: laird@pasture.ecn.purdue.edu (Kyler Laird)
- Newsgroups: misc.consumers.house
- Subject: Re: Power and current
- Keywords: Power and current
- Message-ID: <laird.727847558@pasture.ecn.purdue.edu>
- Date: 24 Jan 93 03:52:38 GMT
- References: <C1Bq16.2EA@math.okstate.edu>
- Sender: news@noose.ecn.purdue.edu (USENET news)
- Organization: Purdue University Engineering Computer Network
- Lines: 16
-
- dunne@math.okstate.edu (Ed Dunne) writes:
-
- >If I have an appliance with a heating element rated at 850 watts, how
- >much current (in amps) is it going to draw in a standard 110V circuit?
-
- Heating elements are purely resistive - they have no appreciable
- inductance or capacitance - so their power factor is considered to
- be 1.0. This means that that current is in-phase with voltage.
-
- So...this is one of the few instances where Watts are equivalent to
- Volt-Amps (VA). Thus, current is found by dividing watts (VA) by
- voltage. In this case, 850VA/110A=7.7A.
-
- No need to worry about start-up or overload surges either...
-
- --kyler
-