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Wiring work
AA
Specification of the protection tube
Name
Temper grade
Flexible PVC
conduit
Class 1 flexible
Galvanized steel sheet
conduit
Class 1 PVC
Galvanized steel sheet
coated flexible
and Soft PVC compound
conduit
Caution for perforating the knock-out hole
• Perforate a knock-out hole by punching it with a hammer.
Caution
• After perforating the knock-out hole, apply rust resisting paint around the hole.
• When you need to pass the cables through the knock-out hole, remove burrs on the hole and protection the
cable with a protection tape or bushing etc.
Caution for installing communication cable
• When you connect the cable, it may sag and pressed by other parts. Therefore cables should be fixed to a
clamp highlighted with a box on the illustration.
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When the protection tube is installed indoor and not exposed to outside,
PVC
because it is embedded in concrete structure
When the protection tube is installed indoor but exposed to outside so
there are risk of damage to the protection tube
When the protection tube is installed outdoor and exposed to outside so
there are risk of damage to the protection tube and extra waterproof is
needed
Applicable conditions
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