2006 Code Changes Rule 10-302(a) and (b)Underground Service
Rule 10-302(a) and (b)Underground Service
An electrical utility’s metal-covered (metallic-sheathed or metal armoured) cable or metal conduit need not be bonded to ground at a customer’s premises if the cables or conduit are isolated from the customer’s internal metallic conduit or piping.
The reason for this rule change: Some electrical utilities prefer to isolate one end of metal-covered cable or metal conduit from ground at the customer’s location so as to minimize corrosion due to:
circulating currents induced by large single-conductor loads;
contacts and galvanic corrosion between dissimilar meals; or
improper operation of cathodic protection systems installed to protect the underground cables or conduit against corrosion.
An electrical utility’s metal-covered (metallic-sheathed or metal armoured) cable or metal conduit need not be bonded to ground at a customer’s premises if the cables or conduit are isolated from the customer’s internal metallic conduit or piping.
The reason for this rule change: Some electrical utilities prefer to isolate one end of metal-covered cable or metal conduit from ground at the customer’s location so as to minimize corrosion due to:
circulating currents induced by large single-conductor loads;
contacts and galvanic corrosion between dissimilar meals; or
improper operation of cathodic protection systems installed to protect the underground cables or conduit against corrosion.
BCD Electric RSS feed