L1, L2, L3, N
(AW G)
Nominal
Total
1.25 load
Main
Volts
Module
MODEL
(AW G/kcmil)
Min
Knockout
Total
Amps
amps
Fuse
KW
NUMBER
Min Field
ground
Diameter
KW
per
calculation
Protection
wire size
wire size
inches
Phase
75C/CU
75C/CU
480Y/277V
4.0
EX480T12
3
8
1-31/32
48
58
73
80
6.0
EX720T12
1/0
6
2-15/32
72
87
109
110
8.0
EX960T12
3/0
6
2-15/32
96
116
145
150
9.0
EX1080T12
4/0
6
3
108
130
163
175
10.5
EX1260T12
250
6
3-5/8
126
156
195
200
IMPORTANT
BEFORE SWITCHING “ON” THE POWER AT THE MAIN CIRCUIT BREAKER PANEL MAKE
SURE THAT THE HOT WATER CIRCUIT IS FREE OF AIR POCKETS OR PREMATURE
FAILURE OF THE ELEMENT WILL OCCUR. TO DO THIS OPEN ALL HOT WATER OUTLETS
ONE AT A TIME FOR A MINUTE OR TWO UNTIL THE WATER FLOW IS CONTINUOUS AND
FREE FROM “GULPING” AND FROM VISIBLE AIR POCKETS.
DANGER
FAILURE TO GROUND THE SYSTEM MAY RESULT IN DEATH OR SERIOUS INJURY
7
