10. Installation
132
Electrical wiring work
<When the module combination is in the tables of "Outdoor unit combination">
Main unit
Sub unit
Sub unit
Communication cable
Power·ground cable
ELCB
MCCB+
ELB
or
Communication cable between outdoor units
Power cable
Protection tube Power/ground cable
Specification 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 flexible conduit Galvanized steel sheet
When the protection tube is installed indoor but ex-
posed to outside so there are risk of damage to the
protection tube
Class 1 PVC coated flexible
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
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