![]() All grounding systems must be carefully coordinated, especially in regard to: NEC grounding electrode systems lightning protection communications grounding and computer room signal reference guide. In smaller switchboards, front access only is acceptable if space is limited. ![]() Switchboards should be front and rear accessible. Feeder devices of switchboards below 2,000 AMPS may be group-mounted, molded case circuit breakers or fusible switches. Providing a power monitoring and management system is an acceptable option.įeeder devices of switchboards 2,000 AMPS and larger should be molded case, insulated case, power air circuit breakers or fusible switches where appropriate, individually mounted, draw-out type as applicable and electrically operated. Meters should be pulse type for connection to the BAS. The meter section should contain a voltmeter, ammeter and watt-hour meter with demand register. Insulated case and power air circuit breakers should be electrically operated. This main device should be molded case, insulated case, power air circuit breaker or fusible switch (where appropriate) individually mounted, draw-out type (as applicable). 208V and/or 480V service switchboards as well as substation secondary switchboards should be provided with a single main service disconnect device.
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