Intermatic IG250LA User manual

120/240 VAC Three wire
F ound at S ervice entrances and
Meter C ans .
Line
Line
G rounded/
Neutral
120 v
120 v
240 v
WHIT E
B LAC K
B LAC K
120/240 VAC Three wire plus Ground
F ound in Main Dis connect S witches ,
Main Distribution panels, Load C enters
S ub panels and equipment locations.
Line
Line
Neutral
G round
120 v
120 v
240 v
120 v
120 v
B LAC K
B LAC K
240 VAC Two wire plus Ground
from a single phase panel
F ound at connections for individual
pieces of equipment such as motors,
water heaters and parking lot lights.
Line
Line
G round
240 v
B LAC K
B LAC K
120 v
WHIT E
WHIT E
WARNING:
 Intermatic Incorporated recommends that the UG and IG series Secondary Surge Arresters be
 installed by a licensed electrician. Hazardous voltages may be present. These units are not
 intended to protect against direct lightning strikes.
MAINTENANCE:
 Inspect periodically to be sure that the Red indicator LED is on. If it not, unit is no longer providing
 surge protection and should be replaced.
APPLICATION
 This model is designed specifically for 120 / 240 VAC single phase or split phase applications. If
 your application does not match one of the diagrams shown below, call your supplier or Intermatic.
INTERMATIC INCORPORATED
PLAZA, SPRING GROVE, ILLINOIS 60081-9698
© Copyright 2007 Intermatic Inc.
Model UG240R and IG250LA
Secondary Surge Arresters
INSTALLATION
INSTRUCTIONS