Generac
®
Power Systems, Inc.
5
1.7.1
2-POLE MECHANISMS
These switches (Figure 1.1) are used with a single-
phase electrical system, when the single-phase NEU-
TRAL line is to be connected to Neutral Lug and is
not to be switched.
Figure 1.1 — 200 Amp, 2-pole Transfer
Mechanism
Solderless, screw-type terminal lugs are standard.
Conductor sizes must be adequate to handle the max-
imum current to which they will be subjected. The
installation must comply fully with all applicable
codes, standards and regulations.
Before connecting wiring cable to terminals, remove
any surface oxides from the cable ends with a wire
brush. If ALUMINUM conductors are used, apply
joint compound to conductors. After tightening the
terminal lugs, carefully wipe away any excess joint
compound.
All power cables should enter the switch next to the
transfer mechanism terminals. Standard terminal
lugs on the transfer mechanism are solderless,
screw-type.
Connect power source and load conductors to clear-
ly marked transfer mechanism terminal lugs as fol-
lows (Figure 1.2):
1. Connect NORMAL (UTILITY) power source cables
to switch terminals N1, N2.
2. Connect customer LOAD leads to switch termi-
nals T1, T2.
Conductors must be properly supported, of approved
insulative qualities, protected by approved conduit,
and of the correct wire gauge size in accordance with
applicable codes.
Tighten terminal lugs to the following torque values
as noted inside the transfer switch door.
Be sure to maintain proper electrical 1/2-inch clear-
ance between live metal parts and grounded metal.
STANDBY
SUPPLY
CUSTOMER
UTILITY
SUPPLY
/NORMAL
LOAD
E1
N2
N1
T1
T2
E2
TRANSFER SWITCH
RATED VOLTAGE
RATED CURRENT
200 AMP
0C8884
600 VAC CSA
480 VAC UL
XXXXXX
STANDBY
T2
B
OFF
A
UTILITY
ON
B2
A1
T1
CHANGE
OVER
DISPLAY
"B" POWER SOURCE
LOAD SIDE OF SWITCH
"A" POWER SOURCE
AUXILIARY
SWITCH
MANUAL
HANDLE
INLET
OPER. CIR.
TERMINALS
*
*
*
*
Section 1 - General Information
Generac Liquid-cooled 20 kW Generator
ENGINE
ALTERNATOR
ENGINE
HEATER
CONTROL
PANEL
AUTOMATIC
TRANSFER
SWITCH
E1
00
E2
N1
N2
T1
T2
00
23
T1
194
00
23
T2
E2
N1
N2
E1
00
N2
N1
00
T2
T1
00
CUSTOMER CONNECTION
(MAX 100A FOR 0752+0754)
UTILITY SUPPLY
CUSTOMER
LOAD
CONNECTION
NC
NO
C
NC
NO
C
RY1
RY4
D
RY
CO
NTA
C
T
D
RY
CO
NTA
C
T
E
N
G
INE RUN
S
HUTD
O
WN FAULT
44
33
22
2
6
1
4
85
14
14
13
56
56
0
0
85
49
E
11
4
1
6
2
44
33
22
11
56
14
13
14
85
56
0
0
85
49
MAIN
W
INDIN
GS
DPE
W
INDIN
G
W
INDIN
G
FIELD
F
UEL
SO
L
DS
TRBT
R
S
-D
O
WN
+
D
C
S
TART
IG
N B
OOS
T
G
ND
G
ND
S
-D
O
WN
C
A-EX
C
IT
B
LA
C
K
WHITE
G
REEN
(MOUNTED IN
GENERATOR
ENCLOSURE)
(MAX 200A FOR 0753+0755)
194
Figure 1.2 — Transfer Switch Interconnections (20818-B)
