3 core and earth (brown, black, grey and non-insulated copper core). This is generally used as it allows for pir lighting to incorporate a permanent override which enables the light to remain on and by-passing the pir function.
3 core and earth (brown, black, grey and non-insulated copper core). This is generally used as it allows for pir lighting to incorporate a permanent override which enables the light to remain on and by-passing the pir function.
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