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#129182 - 09/20/04 03:04 PM comercial load calculations  
lrsilvas  Offline
Junior Member
Joined: Sep 2004
Posts: 4
PLEASANT HILL , CA
HI . I NEED TO MAKE SOME LOAD CALCULATIONS FOR A NEW DENTAL OFFICE WITH A THREE PHASES MAIN PANEL, 100 AMPS AND I HAVE EQUIPMENT OF 120 VOLTS; 208 AND 208 THREE PHASES, BUT WHEN I TRY TO DO THE CALCULATION I JUST CHECK DIFFERENT BOOKS AND ALL OF THEM HAD DIFFERENT WAYS TO DO AND I GOT CRAZY, I JUST MADE MY OWN SYSTEM AND LOOKS FINE BUT I DONT KNOW IF IT IS CORRECT, I JUST SUM THE WHOLE POWERS AND AFTER 10000 VA I JUST PUT THE REST WITH 0.5 OF FACTOR TO LOWER MY AMPS.
CAN SOMEBODY TELL ME WHERE I CAN FIND REALLY EASY TO UNDERSTAND EXAMPLES BOOK OR CASES BUT REALLY CLEAR TO FOLLOW???
THE BOOKS I HAVE THEY REALLY SAY DIFFERENT METHODS ESPECIALLY WITH THE NEUTRAL WIRE SIZE AND AMPS OF THE SYSTEM .
THANKS
LUIS

(email address removed, there is no reason to list email addresses here)

[This message has been edited by Webmaster (edited 09-20-2004).]


LUIS SILVA SANTISTEBAN
CALIFORNIA GENERAL BUILDING AND ELECTRICAL CONTRACTOR 770370 HIC
MEMBER OF BETTER BUSINESS BUREAU
925 705 0856

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#129183 - 09/21/04 08:45 PM Re: comercial load calculations  
OreElect  Offline
Member
Joined: Mar 2004
Posts: 98
Salem,Oregon.USA
Article 220, 2002 NEC.

Annex D examples in the back of NEC.


#129184 - 09/24/04 09:54 AM Re: comercial load calculations  
GamecockEE  Offline
Member
Joined: Jul 2004
Posts: 49
Georgetown, SC 29440
Irsilvas,
Stallcups Master Electrician's Study Guide, and Stallcups Electrical Design book has good examples to guide & practice with. I have used it myself to prepare for my Master's exam and in my EE Practice. You also need to refer to the appropriate NEC articles for health care facilites.



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