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mark480

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what is the information that i need to properly document information to give to a engineer to place on mcc`s and panels thanks mark
 
mark480 said:
what is the information that i need to properly document information to give to a engineer to place on mcc`s and panels thanks mark
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430.98 Marking.
(A) Motor Control Centers. Motor control centers shall be marked according to 110.21, and such marking shall be plainly visible after installation. Marking shall also include common power bus current rating and motor control center short-circuit rating.

110.16 Flash Protection.
Electrical equipment, such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers, that are in other than dwelling occupancies, and are likely to require examination, adjustment, servicing, or maintenance while energized shall be field marked to warn qualified persons of potential electric arc flash hazards. The marking shall be located so as to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment.
 
cpal said:
430.98 Marking.
(A) Motor Control Centers. Motor control centers shall be marked according to 110.21, and such marking shall be plainly visible after installation. Marking shall also include common power bus current rating and motor control center short-circuit rating.

110.16 Flash Protection.
Electrical equipment, such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers, that are in other than dwelling occupancies, and are likely to require examination, adjustment, servicing, or maintenance while energized shall be field marked to warn qualified persons of potential electric arc flash hazards. The marking shall be located so as to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment.[ark flash is what i need info on thanks
UOTE]
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ark flash rec

ark flash rec

I would like to know the info that is needed to properly do a ark fault calculation for mcc`s on my plant thanks
 
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you might also want to consider these requirments if the MCC has ocp (usually does)

408.4 Circuit Directory or Circuit Identification.
Every circuit and circuit modification shall be legibly identified as to its clear, evident, and specific purpose or use. The identification shall include sufficient detail to allow each circuit to be distinguished from all others. Spare positions that contain unused overcurrent devices or switches shall be described accordingly. The identification shall be included in a circuit directory that is located on the face or inside of the panel door in the case of a panelboard, and located at each switch on a switchboard. No circuit shall be described in a manner that depends on transient conditions of occupancy.
 
mark480 said:
I would like to know the info that is needed to properly do a ark fault calculation for mcc`s on my plant thanks
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For each point you need to know the available fault current, arcing current, electrode gap, and clearing time of the upstream protective device.

I suggest you hire an engineering firm to do the study for you.
 
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