UNF, UNY Series Explosionproof Expansion Unions
UNF/UNY Expansion Unions are designed to be used in all threaded rigid metal conduit systems indoors and outdoors, in hazardous locations to:

Connect conduit to a junction box or device enclosure

Compensate for conduit cut too short

Allow for expansion and contraction of conduit

Connect stub-ups to threaded conduit

Replace sections of conduit runs

Compact design

Internal beryllium copper grounding spring to ensure positive grounding continuity

Knurled surface on body and sleeve allows secure gripping with wrench

Steel construction for maximum strength

Available in two styles – short length where space is limited, long length when extra expansion is required

Class I, Division 1 & 2, Groups C, D
Class II, Division 1, Groups E, F, G
Class II, Division 2, Groups F, G
Class III

UL Standard: 1203
CSA Standard: C22.2 No. 30