Are SPD's required for 120/208V and 120/240V lighting panels?

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stzu0125

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The incoming power (480/277V, 3 phase, 4 wire, 400A) hits a main breaker which then feeds a manual transfer switch, that can be switched between regular incoming utility power and emergency power. The manual transfer switch feeds a main breaker in an MCC. A 30KVA, 3-phase, 480-120/208V dry-type transformer is fed from the MCC and feeds a lighting panel. A 25KVA phase, 480-120/240V dry-type transformer is also fed from the MCC and feeds a lighting panel. Both lighting panels are in the same room as the MCC. Does each lighting panel require it's own surge protective device? Thanks,
 
stzu0125 said:
The incoming power (480/277V, 3 phase, 4 wire, 400A) hits a main breaker which then feeds a manual transfer switch, that can be switched between regular incoming utility power and emergency power. The manual transfer switch feeds a main breaker in an MCC. A 30KVA, 3-phase, 480-120/208V dry-type transformer is fed from the MCC and feeds a lighting panel. A 25KVA phase, 480-120/240V dry-type transformer is also fed from the MCC and feeds a lighting panel. Both lighting panels are in the same room as the MCC. Does each lighting panel require it's own surge protective device? Thanks,
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There are few cases where a SPD is required by code. Lighting panels are not one of them.
 
If it is actually an Article 700 emergency system, 700.8 requires a SPD.
700.8 Surge Protection. A listed SPD shall be installed in or on all emergency systems switchboards and panelboards.
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However the description does not sound like this is actually an Article 700 system.
 
A manual transfer switch is not usually associated with an emergency system, especially as described.

As Don mentioned, if somehow it is an Article 700 system, an SPD would be needed on on all emergency systems switchboards and panelboards.
 
ron said:
A manual transfer switch is not usually associated with an emergency system, especially as described.

As Don mentioned, if somehow it is an Article 700 system, an SPD would be needed on on all emergency systems switchboards and panelboards.
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It would appear that he OP is confusing what is really an Article 702 system with an Article 700 system as you are saying. This seems to be a common issue when discussing generators. We sort of have rule around our office to not use the term "emergency" when discussing a generator that is not part of a true Article 700 system.
 
ron said:
A manual transfer switch is not usually associated with an emergency system, especially as described.

As Don mentioned, if somehow it is an Article 700 system, an SPD would be needed on on all emergency systems switchboards and panelboards.
Click to expand...
The fact that the transfer switch is manual did not even register with me when I posted my response:)
 
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