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11
100A/60A Universal Voltage GMT Fuse Panels
With Enhanced Power/Fuse & Bay Alarms
Power
:: HPGMTXX & GMTXX
(NEC specifies only one load at each output terminal.) Tighten #6-32 screws using either a flat-tipped
screwdriver or Phillips screwdriver (for cross-recessed screw heads) to no greater than 6 in.-lb (~0.7 N•m).
Connect other end of output wire to load.
For Model GMT20 —
a. Working with one wire at a time, either
• Crimp a single-hole ring or fork lug for a #3-48 screw-post terminal, as required by NEC, or
• Strip 3/8 in. (10 mm) of insulation from a #30 to #16 copper wire for a bare-wire connection.
b. Clean panel terminals and lug (if applicable) with a nonabrasive, nonmetallic cleaning pad.
c. If required, lightly coat anti-oxidant on lug/wire and output BATT and RTN terminals, and then connect to
terminals. (NEC specifies only one load at each output terminal.) Tighten #5-40 screws using either a flat-
tipped screwdriver or Phillips screwdriver (for cross-re- cessed screw heads) to no greater than 5 in.-lb
(~0.6 N•m). Connect other end of output wire to load.
19. Record circuit assignments in accordance with operating company procedures and guidelines.
The manufacturer’s designation card, shown below, is a 10 in. (254 mm) by 21⁄2 in. (57 mm) card that folds in
half to fit a card holder located below the status LEDs.
20. Make sure load devices are off (disabled) and then install GMT fuses.
Remember, GMT fuses need to be installed so that failure indication flags are at the bottom,as shown in the
following illustration.
SIDE A
SIDE B
FUSETYPE
FUSETYPE
RACK/BAY#
RACK/BAY#
POS
POS
POS
POS
AMP
AMP
AMP
AMP
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
Figure 11 - Designation Card
ALERT
!
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 between 10A
and 20A not exceed 70% of the fuse rating. For example, the load for a 15A GMT fuse should not exceed
10.5A (15A x 0.70 = 10.5A).