how to size GEC for 800 amp service

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Steviechia2

Senior Member
Location
Massachusetts
I have a 800 amp 3 phase service being fed with parallel 500 mcm copper conductors.

Table 250.66 gives me the sizing for the GEC. Do I just double the 500 mcm by 2 and call it 1000mcm which would fall under the 2/0 CU?
 

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
correct
(with exceptions for ground rods and concrete-encased electrodes)
 
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