Dc Cabling Installation For M88H; 121 - Delta M88 Series Operation And Installation Manual

3.4.1 DC Cabling Installation for M88H

Please read the following instructions for attaching DC terminals (M88H
• It is important to choose the proper size for DC cable.
• The cross-sectional area for each internal cable is 50 -120 mm
• DC Terminals connection as seen in Figure 3-21.
- The screw with torque 26 N‧m is required for fixing.
- The required bending space is 135 mm as the requirement states.
- For aluminum cable :
Min./max. Conductor cross-section 120 / 150 mm
Tightening torque 30 N‧m
The cable gland is suitable for multi-core cable, if wiring is using single-core cable with 2" flexible
metal conduit, please follow below suggestions to avoid water intrusion:
a. Insert the flexible metal conduit to cable gland and seal the conduit from both inside and
outside the wiring box and the gap between gland and conduit by using duct seal to prevent
living creature or moisture enter the wiring box.
b. Replace the cable gland to 2" EMT connector and seal the conduit from both inside and
outside the wiring box and the gap between gland and conduit by using duct seal to prevent
living creature or moisture enter the wiring box.
duct seal
a
ATTENTION
Figure 3-20 : Wiring Box layout for M88H
CAUTION !
conduit
2
+ +
DC1 DC1
+ +
DC2 DC2
- -
DC1 DC1
- -
DC2 DC2
b
33
Installation

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2 .
PE PE
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duct seal
conduit
) :
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