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1 +7
| Article:
100
+50
| IEC WS:
419.3
+30
| Status:
Unanswered +1
| ✓:
A grounding ring encircling the building, in direct contact with the earth, must consist of at least ___ feet of bare copper conductor not smaller than 2 AWG.
a. 8
b. 100
c. 6
d. 20
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