ETC Matrix MkII Rack - Manual (Page 20)

Matrix Mk.II Rack Installation Manual
Section 7
Check Power Installation
Checking main power wiring
WARNING:
Power must be turned OFF when you perform this procedure.
Check resistance between phases, neutral and earth busses.
o Phase to phase; resistance should be 10M
Ω or higher
o Phases to earth; resistance should be 10M
Ω or higher
o Neutral to earth; resistance should be 0
Ω
o Phase to neutral; resistance should be 10M
Ω or higher
Checking load wiring
Check resistance between the load terminals and the neutral bus:
o Above 1 M
Ω - Normal when no load is connected
o Between 1 - 1000
Ω - Normal when loads are connected
o Below 1
Ω - Indicates a dead short in the load wiring
WARNING:
A dead short can cause dimmer module damage.