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AT20, AT40, AT72D, AT87, AT88 AT TRANSFORMERS
69-1641EF 4
Fig. 5. Tighten clamp securely against rim of round
hole.
Fig. 6. Removing large center knockout.
M12126
M9188A
WITH RAISED PORTION OF KNOCKOUTS FACING YOU:
PRY UP TOP SECTION OF LARGE KNOCKOUT
BY INSERTING SCREWDRIVER FIRST AT ONE
SIDE OF SLOT AND THEN AT THE OTHER SIDE.
1
.
THEN PRY UP BOTTOM SECTION OF KNOCKOUT.2.
REMOVE BOTH SECTIONS OF KNOCKOUT WITH PLIERS.3.
SHADED AREAS REPRESENT KNOCKOUTS
AND SCREW SLOTS USED WITH 2 X 4 INCH
OR OCTAGONAL OUTLET BOXES.