Conductor sizes must be adequate to handle the maximum current
to which they will be subjected, based on the 75°C column of tables,
charts, etc. used to size conductors. The installation must comply fully
with all applicable codes, standards and regulations.
All power cables must enter the enclosure through the knockouts
provided. If not using the knockouts, conduit entry into the enclo-
sure must be at or below knockouts to maintain the Type 3R rating.
Conduits should be arranged to provide separation between the Utility
and Generator supply conductors inside the enclosure.
Before connecting wiring cables to terminals, remove any surface
oxides from the cable ends with a wire brush. If ALUMINUM conduc-
tors are used, apply corrosion inhibitor to conductors. Tighten termi-
nal lugs to the torque values on "Utility Service Disconnect Circuit
Breaker", and on the decal located on the inside cover. After tighten-
ing terminal lugs, carefully wipe away any excess corrosion inhibitor.
Use a torque wrench to tighten the conductors,
being sure not to overtighten, or damage to
the switch base could occur. If not tightened
enough, a loose connection would result,
causing excess heat which could damage the
switch base.
Connect power source load conductors to clearly marked transfer
mechanism terminal lugs as follows
1. Connect UTILITY (NORMAL) power source cables to UTILITY
SERVICE DISCONNECT circuit breaker, neutral wire to neutral
block.
2. Connect the GENERATOR (STANDBY) source power cables to
switch terminals E1, E2, neutral wire to neutral block.
3. Connect customer LOAD leads to switch terminals T1, T2, neu-
tral wire to neutral block.
Conductors must be properly supported, of approved insulative quali-
ties, protected by approved conduit, and of the correct wire gauge
size in accordance with applicable codes.
Be sure to maintain proper electrical clearance between live metal
parts and grounded metal. Allow at least 1/2 inch for 100-400 amp
circuits.
The plastic cover must be in place and prop-
erly secured in the mounting grooves of the
Utility circuit breaker after connection of sup-
ply cables. The inside covers of the enclosure
must be securely bolted in place before either
supply source is energized.
Larson Electronics, LLC
Phone: (877) 348-9680
Fax: (903) 498-3364
www.larsonelectronics.com
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