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Specication of the protection tube
Name Temper grade Applicable conditions
Flexible PVC conduit PVC
When the protection tube is installed indoor and not
exposed to outside, because it is embedded in concrete
structure
Class 1 exible conduit Galvanized steel sheet
When the protection tube is installed indoor but exposed
to outside so there are risk of damage to the protection
tube
Class 1 PVC coated exible
conduit
Galvanized steel sheet and
Soft PVC compound
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
Caution for perforating the knock-out hole
• Perforate a knock-out hole by punching it with a
hammer.
• 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 xed to a
clamp highlighted with a box on the illustration.
Path for arranging
external communication
cable
Fixing location of the
external communication
cable
CAUTION
DVM S HE_IM_DB68-05461A-08_EN.indd 75 2017-03-24 오후 1:38:36
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