Connections in 3 Switch Fuse Connection Units (Switch Fuse Spurs) Layout of the Terminals Explained

In this video I look at the connections in 3 different switch fuse spurs (switch fuse connection unit). The layout of the terminals and how the labels differ between brands for the terminals. This video has been produced to help my learners in the electrical workshop at Tresham College.

== 🕐 Time Stamps - Cut to the action 🕕 ==

00:00 - Connection in a fuse spur
00:29 - 3 different types
00:43 - BS1362 fuses
01:12 - Feeding hand dryers etc
01:42 - Connection unit 1
03:27 - Connection unit 2
05:16 - Connection unit 3

Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2, 3 plus AM2, AM2S and AM2E.

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[rabk]

The second had me confused as it was the same as the one, I have and I was not too sure about it as I not seen this type before, but your video help me thank you 😁😁

[julianfisher]

Again all fully explained & crystal clear !! Many thanks & keep your videos coming.

[manuelabayomi]

Your explanation for the third one was what I was looking for. Thanks

[PickleJim]

Thanks Gary, clear concise and informative as ever.

[tonydemetrios]

So glad I stumbled across your you tube channel. I’m a complete novice doing my part p 18 edition wiring course mid September. And find your videos so informative. Keep them coming 🤣🤝

[kierandoherty]

Great stuff cleared up my confusion on supply & load 👍

[formicapple]

Many thanks for explaining this to me.

[davidb]

Great factual video clearly pointing out the inconsistencies relating to terminations within accessories.
While my personal preference is for the MK unit, I do find the flex cable grip difficult to use on any cable with conductors over 1mn csa.
Considering how long accessories have been in production it is surprising the lack of uniformity from manufacturers.

[tobycoombs]

Another great video for your learners 👍🏻

[brightspark]

Great video as usual Gaz. I wish manufacturers standardised the locations of the terminals so they are in the positions of the first FCU you showed. I've used FCUs with the terminals laid out in the second example and it's really fiddly to get the wires in neatly because they are spread across the back of the FCU, whereas with the first example you can bend the cables easier to fit into the backbox.

[adnanidf]

Great video. Very clear to understand.

[zedman]

Great Job. One takeaway... Choose MK 😉

[Marcel_Germann]

For the protective earth I would always use the the terminal most far away from the flex entry. Then the PE conductor is always longer than the L and N of the flex. If someone rips out the flex cable and the strain relief is failing, the protective earth connection will fail as the last connection. I always make the PE ~20mm longer than L and N. Sometimes this is ensured by the construction, for example of a plug. The BS1363 for example, the PE conductor is the longest wire, and through this it will fail at last.

[dg]

Good educational video. Kept it factual too rather than telling us that the second example was a rubbish design. Would it be more accurate though to state that the fuse must be selected to protect the outgoing cable rather than the connected load? I know practically speaking that you'd want to coordinate all three.

[fostexfan]

can you connect another 2.5mm wire into the supply terminals to continue the supply or is it better to use a junction box?

[earlofgriefem]

I'm doing a job where I need to re-box in some boiler pipes. The old boxing had one of these switches and I plan to replace. So I understand the load is the kitchen extracor fan but I have 2 other cables feeding in, one is from a plug socket and one presumably is connected ti the consumer unit, I was wondering should both of these cables classed as supply (in) ?

[SinsofMathetes]

So I have the first switch fused, all electrics works as should but when I switch off at fuse electrics still work, even when I take fuse out!

[shaunbeard]

Hi Gaz could this be used to step down from a ring main to run a light in my she'd. With the appropriate wire and fuse. Many thanx

[imonwb]

Hi can I add fcu from fcu as the other spur socket is going out to the garden. Thanks

[michaelcostello]

Is there a video on where there may be dangerous high voltages present in a factory etc etc eg at transformers . Places we need to keep well away from.