12
S&C Instruction Sheet 761-505
Installation
Installing Pipe Couplings with
Piercing Set Screws
WARNING
Failure to properly install pipe couplings with
piercing set screws can cause slippage of operating
pipe, resulting in improper operation of the switch,
arcing, equipment damage, or electrical shock.
To properly install piercing set screws:
1. Make sure the cutting tip of the piercing set screw does
not protrude through the body of the clamp.
2. Insert the operating pipe section into the coupling and
fi nger-tighten the clamp bolt(s).
3. Adjust the operating pipe to the correct length. Then,
tighten the clamp bolt(s) to fi nal tightness.
4. Tighten the piercing set screw, piercing the pipe, and
continue turning until a fi rm resistance is felt.
5. Make sure the clamp bolt(s) are tight.
See Figure 9.
Piercing set screw in shipping position (cutting tip
does not pro trude through body of the clamp)
Operating pipe installed, clamp bolt fully tightened,
and piercing set screw in final position
Clamp bolt
Coupling body
Piercing
set screw
Slug pierced
from pipe
Clamp
Figure 9. Installing the pipe couplings.
