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Instruction Booklet IB 70-8704
Effective January 2009
Slide Interlock
(To operate, turn
the utility breaker
to the OFF
position. Lift the
interlock and hold.
Turn the generator
breaker to the ON
position. Release
the interlock.
Reverse these
steps to power
loads via utility).
Figure 1. Manual Transfer Switch with Door Open.
These Manual Transfer Switches utilize 3-pole switching devices to
determine which power source, utility or generator, are powering
the nine emergency circuits. The 3-pole switching devices are inter-
locked via a manual slide type interlock. The intent of the interlock is
to ensure that only ONE source is powering the emergency circuits
and to prevent back feeding of the utility with the generator or inad-
vertent paralleling of the utility and generator sources.
Figure 2. Connection Locations for a Separately Derived System.
Connection for a Separately Derived System:
1. For generators that are configured as a Separately Derived
system. These units typically contain GFCI protection on the
generator.
a. Connect the two hot wires from the utility to the utility
breaker poles #1 and #2. Connect the utility neutral to the
utility breaker pole #3. See Figure 2 for clarification.
b. Connect the two hot wires from the generator to the
generator breaker poles #1 and #2. Connect the generator
neutral to the generator breaker pole #3. See Figure 2 for
clarification.
2
eaton corporation www.eaton.com
Eaton Corporation's Family of Manual Transfer Switches
for Residential and Light Commercial Applications
Utility Pole #1
Utility Pole #2
Utility Pole #3
Generator Pole #1
Generator Pole #2
Generator Pole #3
CAUTION
FOr A sepArATely derIved sysTem FAIlUre TO CONNeCT As
desCrIbed IN These INsTrUCTIONs wIll resUlT IN NUIsANCe TrIp-
pINg OF The geNerATOr gFCI CIrCUIT breAker.
Utility Breaker Shown
in the ON Position
Generator Breaker
Shown in the OFF
Position
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