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 Service size for Chiropractic Office: X-Ray
#185338
03/11/09 03:00 PM
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Joined: Dec 2004
Posts: 1
OP
New Member
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Trying to size a service for a chiropactors office and not sure on the demand for an X-Ray machine. The X-Ray Tech say's he needs an 100 Amp 220V circuit. Here's what I have existing:
100 Amp 3 Phase Service w/ 1 Alum Conductors
So do I figure the X-Ray machine at 100% demand?
And my load calcs would be:
12 receptacles @ 180VA = 2160
640sq.ft. @ 3 VA = 1920
Heat @ 10,000 VA
Sign Ckt. @ 1200 VA
X-Ray Machine @ 24,000VA
Total 39,280 VA
39,280VA / 240V = 163.66 Amps / 1.73 = 94.60 Amps
Correct? The 100 Amp service should be suffecient?
Thanks !!!
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Re: Service size for Chiropractic Office: X-Ray
[Re: Wardey]
#185339
03/11/09 05:18 PM
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Joined: Mar 2003
Posts: 849
Member
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if your using 240 x 1.73 it must be a high leg delta??
IF ITS A 120/208 Y (most common) it be 208 x 1.73 =359.84
Just checking.
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Re: Service size for Chiropractic Office: X-Ray
[Re: Yoopersup]
#185341
03/11/09 06:15 PM
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Joined: Dec 2000
Posts: 4,287
Member
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Yoop,
Wrong answer.
If 208 volts you DIVIDE it by 1.73
Not MULTIPLY it.
39,280VA / 208V / 1.73 = 109.15 Amps
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Re: Service size for Chiropractic Office: X-Ray
[Re: electure]
#185343
03/11/09 06:26 PM
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Joined: Mar 2003
Posts: 849
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39280 divide by 359.84 =109.15962
Sure looked like devideding to me?????
1.73 x 208= 359.84
39280 Divided by 359.84
Last edited by Yoopersup; 03/11/09 06:31 PM.
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