Intermatic IG250LA Installation Instructions

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.
Line
120 v
G rounded/
240 v
Neutral
120 v
Line
120/240 VAC Three wire
F ound at S ervice entrances and
Meter C ans .
Model UG240R and IG250LA
Secondary Surge Arresters
B LAC K
WHIT E
B LAC K
Line
240 v
Line
120 v
G round
240 VAC Two wire plus Ground
from a single phase panel
F ound at connections for individual
pieces of equipment s uch as motors ,
water heaters and parking lot lights .
INTERMATIC INCORPORATED
PLAZA, SPRING GROVE, ILLINOIS 60081-9698
© Copyright
Line
Neutral
Line
G round
120/240 VAC Three wire plus Ground
F ound in Main Dis connect S witches ,
Main Dis tribution panels , Load C enters
S ub panels and equipment locations .
B LAC K
120 v
B LAC K
WHIT E
2007 Intermatic Inc.
INSTALLATION
INSTRUCTIONS
B LAC K
120 v
240 v
120 v
B LAC K
120 v
WHIT E