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Think inside the box on cable gland earthing!

16 October 2015

If you want to avoid corroded earth connections and would rather avoid special order earth continuity plates while guaranteeing the safety and integrity of cable gland earthing. Or if you simply want to fit and earth metal cable glands to electrical junction boxes in a better, safer and quicker way – have a look inside the box…

The essential connection

It’s often said ‘If it ain’t broke don’t fix it’ but what if a way of doing things is just so mundane and unchallenged that its shortcomings are just accepted? We saw so much difficulty terminating armoured cable glands correctly….we did something about it!

What you see inside the box, apart from the usual cable and terminals, is an EarthingNut. EarthingNuts are a simple product designed by an electrician to make troublesome securing and earthing of metal cable glands a thing of the past. The original design was created to improve the connection where armoured cables were terminated into non metallic enclosures, but they have benefits with metallic enclosures too. These benefits include durability, paint removal, ease and speed of fitting, no drilling for earth bolts, easier EMC shielding, low resistance, easy earthing on IP rated enclosures, and more besides. The key is that EarthingNuts are easier to fit than conventional methods and do not rely on the enclosure wall to maintain their connection. 

While EarthingNuts are selling well through SWA in the UK and Cabac in Australia to the general electrical market and have been available for nearly ten years, we are now researching all sectors of the electrical industry globally to find where else EarthingNuts can help make cable gland earth connections safe, easy and trouble free. So if any of the following strikes a chord, or you just feel this area is well overdue for improvement- then we’d like to hear from you.

•  Do your projects use armoured cables or metallic cable glands that need to be earthed?
•  Do you find that you are using metallic enclosures where an insulated enclosure would be better?
•  Would you rather avoid the need to use pre ordered internal earth continuity plates?
•  Do you use integral earth glands with external earth connections? Would you prefer to make the earth connections internally?
•  Do your earth connections suffer from corrosion or breakage?
•  Could your systems benefit from using class 11 insulated cable glands with the connections made internally?
•  Do you need to isolate cable glands from metal enclosures?
•  Do you encounter incorrectly fitted or unearthed conduit or cable glands, or work around solutions where non metallic enclosures are used?
•  Do you encounter glands loosening through vibration?

We would love to hear of your problems encountered in the area of metal cable and conduit glands entering enclosures, also where you are and what electrical sectors you work in where these problems occur. We can even send you a sample….

Take a look at our UK Partner, SWA’s promotional video for their Tauras ™ cable gland packs containing EarthingNuts here

Oh, we won an award for EarthingNuts in 2010 too, and were highly commended in the IET innovation awards of the same year!

EarthingNuts are tested to section 10.4.2 of BS EN 50262 and have passed to category B exceeding the test plant capacity!

EarthingNuts are protected by patents in over 20 countries and we are looking for licensees in specific sectors.  We’re told that with the right type of licence, this might open up serious cost savings for qualifying companies. Contact us for details.

Please send all replies to quoting HE1.

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