Plan Your Installation; Conductor Sizing And Overcurrent Protection - Current Technology ISM Series Installation, Operation And Maintenance Manual

CURRENT TECHNOLOGY ISM
® TM

Plan Your Installation

Conductor Sizing and
Overcurrent Protection
INTEGRATED SUPPRESSION MODULE
W A R N I N G ! The performance of the ISM will be severely
✓
limited if the conductors are too long, are of too small a wire gauge,
have too many bends, or have sharp bends.
These factors should be addressed during the design of an installation to
ensure that there is a suitable place reserved for the stand-alone ISM next
to its point of connection to the panelboard it is protecting . The selected
mounting location should ensure short conductor runs and a minimum of
bends . If bends are required they should be sweeping bends . Do not make
sharp 90° bends for aesthetic purposes .
Conductor Length and Sizing: Conductor length must be kept as short as
possible and avoid sharp bends . The following conductor sizes for phase,
ground and neutral connections are recommended .
Table 2: Maximum Recommended Conductor Size
Model
ISM-050
ISM-080
ISM-100
ISM-125
ISM-150
ISM-200
ISM-250
ISM-300
NOTE: Table 2 conductor sizing recommendations ensure that the effective
clamping voltage of the ISM at the point of connection is kept to a minimum
in order to maximize protection. Use solid or stranded copper or aluminum
conductor with strip length of 0.5".
Overcurrent Protection: When used as a Type 1 SPD, the ISM does not
require upstream over current protection for safe operation, however, the
design may require or the installer may choose to connect the ISM to a circuit
breaker, molded case switch or fused disconnect .
If a breaker or molded case switch is used for connecting the phase
conductors, Current Technology
Use conductor lengths
less than 10 feet
#6 AWG
#6 AWG
#6 AWG
#2 AWG
#2 AWG
#2 AWG
#2 AWG
#2 AWG
recommends a 100 amp rating.
®
9
Max Torque
(in-lb)
45
45
45
50
50
50
50
50