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Wiring a Junction Box

21st Nov 2019

Something that often gets overlooked by our customers is how they are going to wire all of their new pond equipment up to the electrics. There are various ways to do this but we would always recommend using a junction box. They’re fairly quick and straight-forward to set up, they’re safe, and it keeps all of your electrical connections in one place for you to easily switch on and off as required. Simple!

I think a lot of people are put off by them because they look complicated, so have a read of the below where I’ve explained everything they come with, how to set them up, and how easy they really are to use.

This is the Standard Junction Box that we stock, we have 6, 4 and 3 way switch boxes available on our website. They are weatherproof and can be mounted onto a wall or post. The maximum load on these should not exceed 1200 watts and they use a 5 amp fuse. We also stock a version for armoured cable, as well.

The junction boxes have very sturdy switches that have a rubber case over them, you can even get the spare rubber parts if needed. We have stocked these units for year and so far we have only had one switch break from the hundreds we have sold, so that gives you an idea of how sturdy they really are!

The fuse removal on the 6 way junction box is super easy, it is done from the front by using a flat headed screwdriver to twist and remove. Unfortunately, if you have the 3 or the 4 way one you will have to open the full unit to access this. Saying that though, I have had the old style 6 way one that doesn’t have this feature for nearly 10 years and not once changed the fuse!

Inside the box you will find instructions, blanking caps for unused switches and the circuit board as pictured to the left here. On the right-hand picture of the box, you can see 4 circles, these are for the mounting, you have some fittings inside for this too.

To use the blanking caps, fit them in place and tighten the locking nut.

Wiring is very simple too, the blue connection point is for the power input, the rest of the black connections are where you would wire your products into. They are clear labelled with L – Live, N – Neutral, Earth – symbol. Simply use a small flat headed screwdriver to loosen, pop in the wires and then screw tight shut.

The above picture will save you a huge amount of time, ALWAYS thread the wires through the cable gland in the bottom before securing your cables into the circuit board. Otherwise you may have to re do every one. …I may have done this several times and looked very silly!

When the unit has power going to it a red light will be lit up constantly, you will notice that even if none of the other switches are in the ‘on’ position and the red light will stay on, you don’t use a switch to turn the junction box on.