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Q & A

Cable Terminations

Is there anything in either the RCD,BSC or IEE Wiring Regs which requires the fitting of ferrules on cable terminations on 12v DC or 230v AC boat wiring systems ?

Asked by: Rodney Hardwick  | 4.47pm, Saturday 11 February

WW says:

No there isn't a direct requirement- but they are useful for many connections (though not Necessarily all) and the IEE requirements suggest their use can be helpful to reduce connection slippage. More important is the choice of wire (type- multistrand, ideally tinned copper and of the correct cross-sectional area for the current applied)

Mark Langley  | 11.07PM, Monday 13 February

It is considered good practice for stranded wire fitted into screwed connections without a spreader plate. The action of tightening a screw directly onto the wire will damage the cable and give an unreliable connecton.

Rupert Smedley  | 1.29PM, Tuesday 14 February

Readers say:

Even if there isn't for the small amount they cost I recommend them as good practice.

Adam Savory  | 9.44PM, Sunday 12 February

For larger 12V cables, I'd recommend tinning the ends if they're being clamped under a screw (you'll need a small blowlamp rather than a soldering iron). This prevents strands being broken, and gives a better connection. If you damage the insulation in the process, just cover with heatshrink insulation. Make sure the tinning doesn't go much beyond the length you need to clamp, as this could cause it to fracture. For heating heatshrink insulation, just get a heat gun from a craft shop - much cheaper than industrial ones, but sometimes only available in pink!

Robert Wood  | 9.45AM, Tuesday 25 April

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