Boat Anode Resistance Check | ⛵ Sailing Britaly ⛵

Boat anodes do an essential job on any boat. However, unless you check the resistance when you replace one, your new anode may do absolutely nothing to protect your boat’s systems.
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It is often assumed that if you bolt an anode to something it will automatically be electrically connected to it. This is often the case but not always.

In my day job I work offshore and when we mobilise our systems on to ships or platforms one of the very first things we do is connect the earth cable from our container to the vessel. (We operate underwater robots and on some systems we send 3000 volts subsea, so the consequences of a mistake could be fatal) After connecting the earth cable – a crimped ring terminal on a large diameter copper cable – to the welded earth stud on the vessel, the resistance is measured. It is often found to be out of limits and the connections need to be cleaned with a wire brush and the connection remade to obtain the low resistance required…

Many of us will have seen boat anodes which have been in the water for a season or more and don’t appear to be wasting away. Due to the low voltages involved in cathodic protection systems it doesn’t take much resistance at all to prevent anodes doing their job. This can easily be avoided by taking 30 seconds to check the resistance with a multimeter whenever you replace an anode. We show you how to do that in this video.

This is an excerpt from the following “Boat Work” video: https://youtu.be/o_Bv7_tAOY4

⛵Sailing Britaly⛵ brings you the sailing shenanigans of Chris (British), Rossella (Italian), and baby Emma (Britalian!) Our mission is to help YOU achieve YOUR cruising dreams, while working for a better world.

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Fair winds!
Chris, Rossella and Emma 😊

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‘Sailing Britaly’ is a Helvellyn Ltd brand. Disclaimer: Due to factors beyond the control of Helvellyn Ltd, we cannot guarantee against unauthorized modifications of this information, or improper use of this information. Helvellyn Ltd assumes no liability for property damage, injury or death incurred as a result of any of the information contained in this video. Helvellyn Ltd. recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, open flames, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of Helvellyn Ltd, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not Helvellyn Ltd.

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