N93-582-01 Issue 1 NH Page 20 of 42 © Protec Fire Detection plc 2015
9.13 Connecting the Mains Cabling
Ensure that the incoming mains supply is isolated by ensuring the fused double pole
isolator is in the ‘OFF’ position.
Pay particular attention that the incoming mains cable is segregated from all other
cables within the Digilite® DL500 enclosure, and that the insulation on all the
conductors is intact.
Ensure the incoming earth cable is firmly connected to the Main PCB ( see figure
9.9 ), and that the earth cable from the Main PCB is securely connected to the brass earth
terminals within the back-box.
The mains wiring must now be restrained using the clamp provided to secure the mains
cables to the control PCB housing ( see figure 9.10 ). The restraining clamp must be
supported at the rear when the two screws are being tightened.
Figure 9.9 Power Supply Terminal Connection Details
Figure 9.10 Mains Wiring Connections and Restraining Clamp
Incoming mains wiring
Mains wiring clamp
Reserved cable entry
position
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