The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Members: Non-Members: Did you know?
by Admin
Today at 02:34 PM
Safety at heights?
by HotLine1
Yesterday at 08:51 PM
International Wire Colour Codes
by Texas_Ranger
Yesterday at 03:29 PM
Looking for older post
by Texas_Ranger
Yesterday at 03:22 PM
Last time to chat here
by Trumpy
01/20/17 11:41 PM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 36
HotLine1 20
Ruben Rocha 17
gfretwell 16
Trumpy 15
Who's Online
1 registered (Admin), 83 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#129182 - 09/20/04 12:04 PM comercial load calculations
lrsilvas Offline
Junior Member
Registered: 09/20/04
Posts: 4
Loc: 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
Top
#129183 - 09/21/04 05:45 PM Re: comercial load calculations
OreElect Offline
Member
Registered: 03/05/04
Posts: 96
Loc: Salem,Oregon.USA
Article 220, 2002 NEC.

Annex D examples in the back of NEC.
Top
#129184 - 09/24/04 06:54 AM Re: comercial load calculations
GamecockEE Offline
Member
Registered: 07/28/04
Posts: 49
Loc: 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.
Top


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals