Motor Control Center Configuration
- Thread starter JSandoval
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- New Jersey
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- Journeyman Electrician
I don't know if there is a standard method. I guess that it would depend on the size of each starter and the load connected to it.
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- Wisconsin
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- PE (Retired) - Power Systems
JSandoval said:
Each manufacturer has a different bucket numbering/lettering system, but they normally go top to bottom. In general columns go from left to right regardless where the incoming is.
gedwards
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- Birmingham, AL
The attached jpg is from Square D's MCC catalog 8998CT9701 (3.5MB) = http://ecatalog.squared.com/techlib/docdetail.cfm?oid=090089268010767e
Square D utilizes 3" horizontal spacing, other mfg. utilize 6". Also depending on the unit itself your structure may be anywhere from 20 to 35"W (5" increments used by Square D).
Unit location it is referenced only by Section # & row origin. For example if you had a starter in section #2 that spanned rows E thru J it would be referenced only as unit 2E.
Hope this helps.
Square D utilizes 3" horizontal spacing, other mfg. utilize 6". Also depending on the unit itself your structure may be anywhere from 20 to 35"W (5" increments used by Square D).
Unit location it is referenced only by Section # & row origin. For example if you had a starter in section #2 that spanned rows E thru J it would be referenced only as unit 2E.
Hope this helps.
weressl
Esteemed Member
JSandoval said:
Most common is numbering the vertical sections from left to right. When I expect future sections to be installed I might start with #3 or #4. If I have back-to-back MCC's that have the same numerical designation say MCC#1 the back MCC would have reversed numbering so that the front and rear of the same vertical section bears the same number. I do this even if they do not share the same horizontal bus.
Most common spacing is 6". Letter designation starting with A on the top. You may want to omit letter J and only use I as they are easily exchanged for each other.
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