Is there some sort of adaptor?
There are 3-core to 3-core waterproof adaptors (https://www.screwfix.com/p/hylec-2-entry-3-pole-in-line-cable-joint/92911) but the steel armour cables won't be earthed so it's a bodge.
Thanks. Like I say, it’s literally to test whether the lights are powerful enough for the patio before they are fixed.
You'll have to fanny around getting the armour cables out of the way, worth watching a video on prepping armoured cable to get the various insulating layers cut to the right length.
@%~} started
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There are 3-core to 3-core waterproof adaptors (https://www.screwfix.com/p/hylec-2-entry-3-pole-in-line-cable-joint/92911) but the steel armour cables won't be earthed so it's a bodge.