13
Amphenol Network Solutions
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509.926.6000 — amphenol-ns.com
High-Power GMT
Series Fuse Panel
15. Repeat steps 12 and 14 for Feed B and observe that
B POWER
LED turns green. Also, across all sets of
alarm pins:
•
Expect continuity (
0Ω
) between Terminals
C
and
NC
•
Expect an open circuit (
∞Ω
) between Terminals
C
and
NO
16. For output wiring, do either of the following:
•
If using lugs,
strip off
3
/
8
-inch (~10 mm) of insulation from one end of the copper output wires and then
crimp on the ring or forked, single-hole lugs, as required by NEC. (Screw terminals will accommodate
lugs for up to 10 AWG.)
•
If using bare wire
, strip off
5
/
8
-inch (~15 mm) of insulation. (Stranded wires should be tinned.)
NOTE:
Output wires must be rated at or above the amperage rating of the GMT fuse. For example, use
no smaller than #14 AWG output wiring for 15A output fuses. Do not exceed 12A continuous load for a
15A fuse.
ALERT! GMT fuses have a small inherent electrical resistance resulting in a small inherent power loss.
For this reason, the GMT fuse manufacturer recommends that the load for GMT fuses up to and including
7.5A not exceed 80% of the fuse rating and that the load for GMT fuse sizes 10A and 15A not exceed 70%
of the fuse rating. For example, the load for a 15A GMT fuse should not exceed 10.5A (15A x .70 = 10.5A).
Total load for all fuse outputs on each side must not exceed 100A for a panel.
17. Lightly coat antioxidant on lugs, wires and output negative and positive terminals before connecting lugs/wires
to outputs. (NEC specifies only one lug/wire and load for each output terminal.
18. Tighten the screws to 6.5 in/lb. (~0.75 N
•
m).
19. Connect other end of output wires to
load
.
20. Use pull-out designation card at front of the panel to record outputs, as specified by operating company
standard operating procedures.
21. Make sure inputs at
loads
are
disabled
by removing all power cards or all input fuses at load equipment.
NOTE: Always follow recommended operating company guidelines when disabling load equipment.