THOMSON TS 880 - Remote Start Contact Field Wiring

TS 880 TRANSFER SWITCH
PM064 REV8 10/01/25 5 Thomson Technology
208V
B
(Orange)
(High Leg)
C
(Yellow)
A
(Red)
N
(White)
PH A
(UA)
Automatic Transfer
Switch (Utility Supply)
PH B
(UB)
PH C
(UC)
Neural
(N)
120V 120V
240V 240V
CAUTION!!!
All installation and/or service work performed must be done by qualified
personnel only. Failure to do so may cause personal injury or death.
Where transfer switches are supplied without power isolation transformers (PT1 & PT2) for
ATS control logic it is essential that the orientation of phase conductors of the supply
source be arranged such that the phase of highest potential with respect to ground is not
connected to the power supply inputs to the controller (A Phase for both supplies). Failure
to do so will result in equipment damage.
Per NEC Article 384-3 (f) “The B phase shall be that phase having the higher voltage to
ground on a 3-phase, 4-wire delta connected systems.”
3.5. REMOTE START CONTACT FIELD WIRING
As a minimum, the remote engine start control field wiring shall conform to the local
regulatory authority on electrical installations. Field wiring of a remote start contact from a