SOR Bourdon Tube Weatherproof Pressure Switch User Manual
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Form 1214 (03.13) ©SOR Inc.
RN Housing
This housing has a 3/4” NPT(F) conduit outlet. The switching element in this housing
is wired to a terminal block marked NC - Normally Closed, NO - Normally Open and
C - Common.
TA or LC Housings
These housings have a 3/4” NPT(F) conduit connection and the micro switch is supplied
with wire leads. The leads are marked and color coded: C (Common) - Blue; NO (Normally
Open) - Black and NC (Normally Closed) - Red. All splices should be made outside
the housing.
Blue (C)
Black (NO)
Red (NC)
Pressure
On explosion proof units (LC and TA housings), power should be turned OFF
before the cover is removed.
Electrical Connections
Switching elements are UL Listed and CSA Certified for AC service. They are SPDT
elements and may be wired to either make or break at a particular pressure on increasing
or decreasing pressure.
Install in accordance with all applicable codes or safety standards.