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Researching the requirements 29
Notes for Figure
3:
-
An isolated ground receptacle must be used for systems with isolated
ground.
An isloated ground receptacle with individual hot neutral and ground
conductors must be used for systems with isolated ground.
An alternate earthing electrode, if required, must be installed in a
minimum of 6 ft. (1.8m) from the building earth reference.
Connections to the building earth reference must be either cadwelded or
provided with two ALCU clamps.
NEMA numbers for IG ground receptacles are:
208/240
@
20
A IG-L6-20
208/240
@
30
A IG-L6-30
120
@
15A
IG-5-15
Panel circuit breakers are:
208V
30A
240V 30A
Connection to the building ground source should be made at the same
physical location as the transformer grounding conductor. If the LRE is
connected to a building ground point other than the transformer ground
point, a bonding jumper must be installed between the two points.
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Installation planning 553-3001-l 20
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