TS 870 Transfer Switch
PM062 REV 11 16/04/19 6 Thomson Power Systems
3.1. INSTALLATION CODES/PERMITS:
Suitable permits are required by local authorities having jurisdiction prior to installing standby
generator sets and automatic transfer switches.
3.2. APPLICATION:
The TS 870 Transfer Switch is Listed by Underwriters Laboratories (UL) to Safety Standard
UL 1008 for Transfer Switches for Emergency Standby applications. This product is intended
for installation and operation on legally required standby applications for emergency power
systems as defined by the National Electrical Code (NEC).
3.3. INSTALLATION LOCATION:
The standard TS 870 transfer switch is designed for indoor wall mounting or outdoor wall
mounting with NEMA 3R rating. The transfer switch must be installed in an environment where
the temperature range is within +5° to +122° Fahrenheit (-15° to +50° Celsius) and humidity
range not exceeding 5%-95% non-condensing.
NOTE: The transfer switch must not be installed in a location where it is subjected to direct
sunlight on the front of the transfer switch door. In these applications, an optionally available
sun-shade kit must be installed.
3.4. POWER CABLING:
All power cabling entering/exiting the enclosure must be installed in suitably sized conduit per
NEC/CEC requirements. Ampacity, type and voltage rating of current carrying conductors must
also comply with NEC/CEC requirements and local authorities having jurisdiction. To ensure
satisfactory installation of this equipment, refer to manual SECTION 15
Cable Terminal
Information regarding power cable connection tightness requirements. All mechanical and
electrical connections must be checked for tightness prior to placing this equipment in service
to ensure proper operation and to validate applicable warranty coverage.
3.5. CONTROL WIRING:
All control wiring for engine start, load shed, alarm and remote test must be installed in
separate conduits from all power cabling and must utilize suitably sized conduits per NEC/CEC
requirements. All control wiring shall be sized for minimum #18 AWG. Control wiring type and
voltage rating must also comply with NEC/CEC requirements and local authorities having
jurisdiction.
NOTE: All field wiring/communication cabling that may be field installed directly onto any ATS
door mounted components must be suitably routed and protected across the door hinge to
prevent possible mechanical damage upon door opening and/or door closing.
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