Calculated Industries 5025 - Manual (Page 17)

User's Guide — 15
[Set] [Grnd] — Equipment Ground
(EqGrnd)
This function uses NEC Table 250-122
to compute the minimum equipment
grounding conductor size, given an
entered amperage rating or setting for a
over-current device up line (i.e., 300
[Set] [Grnd]).
NOTE: This function deviates from the
NEC Table 250-122 for Amp values of
4001 or more. The AL conductor sizes
given in the Table (1200 MCM AL) are
not among those listed in Table 310-
16/17, which is the table the calculator
uses to calculate wire size. In these
cases, the calculator gives a slightly
larger 1250 MCM AL as the appropriate
Equipment Ground wire size.
♦
First Press
Displays the copper grounding conduc-
tor size for the entered amp rating.
Displays: EQPG WIRE SIZE CU
♦
Second Press
Displays the aluminum grounding con-
ductor size.
Displays: EQPG WIRE SIZE AL