How to Fit a Type 2 SPD Remote from the Consumer Unit with Correct Conductor Lengths (Crabtree) 

Hello Gaz, I’m a (very) mature learner and find learning from books hard work so your videos are a Godsend to me, your presentations are so clear and easy to understand. A massive thanks to you and everyone at GSH. Paul.

Your learners have many wonderful opportunities at your college. Keep up the great work lads 👍

Informative and entertaining as always. Can’t beat a bit of torque driver action 👍

An all in one unit is definitely the way to go.

It's about time that screw heads in MCBs etc are torx heads, especially if manufacturers are requesting such high tightening torques.

The requirement of Reg 534.4.8 regarding connections being short and as straight as possible is VERY important and shouldn't be easily ignored. Any bends - especially loops - in the conductor will appear to any extremely fast-rising voltage 'spike' (in the order of a number of kV in microseconds) as a significant impedance. The danger is that some other part of the installation presents a lower impedance path to earth and is damaged while the SPD remains intact. Same principles apply to the earthing of surge diverters on HV overhead lines and terminations. I've seen flashovers from 90 deg bend 'elbows' in 70 sq mm earthing conductor, which looked great but ultimately defeated the purpose of the protective device.

Thanks for the content SPD’s very helpful team Electrical 😁👍

My poor old arthritic wrists were aching in sympathy watching that tightening. Also I can think of a few larger switchboards that would exceed the 0.5-1.0m distance just within the board...

It can't get any better.. Can it... Amazing as usual lads.. 👍👍👍

Brilliant video guys, very informative. 👍

Very helpful team Electrical 👍👍

Good idea for a video!

Great informative video.

I didn't realise that the 1 mtr rule includes both the live conductor AND the earth conductor. Thanks for that update. 👍👍 I assume then that the self contained stand along packages you can buy are fully conversant then.

Poor old spark following up trying to undo those terminals 😂 on a plus side the last guy said consumer unit, and not consumers unit 😁

Great video wrist strength test as well 💪

Great video, just one suggestion. As a rule of thumb, always install SPDs downstream of MCBs and upstream of RCCB (MCB --> SPD --> RCCB). There are exceptions of course, with certain types of RCCB's being able to be installed upstream of the SPD but follow the rule of thumb if you don't want to deal with that constraint.

THESE TORQUES SETTINGS ARE ALL O/K BUT WHEN YOU ARE JAMMED UP NEAR THE CEILING OR UNDER THE STAIRS NOT SO EASY I THINK THEY SHOULD MAKE THESE NEW DRIVERS WITH A TEE BAR RATHER THAN THE ORDINARY SCREWDRIVER HANDLE MIND YOU COULD MAKE YOUR OWN

10:28 did I hear a fart? 🤣

Great Video, well presented by everyone

Top tippery as always chaps!

Nice video

Great video guys.. looks like Wera need to step up the game, as my new torque set only goes as high as 3.0nm ... oh dear!

Where does the initial seperate board and spd enclosure stand with regards to 521.5.1 (ferromagnetic enclosures: electromagnetic affects)?

Hello If you install a new ring main circuit does it have to have a surge device installed or can the customer refuse

I fit meters which are specific for solar, the torque setting for the terminals are 0.9nm. Had to buy another torque driver handle to go down that low, never seems tight enough but ours is not to reason why and I always do a tug test.

How do you work out the size of the mcb feeding the spd? I have a 63amp and 100amp 3 phase db that needs a spd

A Tip with Whia drivers is that you can use a spanner on the handle to help with leverage

could you maybe do a video abot SPD in TT system.. i would like to know more about it..as it is completely diffrent story on TNCS and TT many thanks

4.5 Nm seems really excessive. Great Video especially on the relevant reg.

I'm about to move my consumer unit position (fitting a new one in the process) and moving the cut out into the garage with a 80A switchfuse mounted adjacent to feed the house. I was looking at ready made self contained SPDs and read the instructions. I'm advised that SPDs are not suitable for an overhead fed property (which is my place, a rural position on a hill and exposed). Im puzzled, we have had a lighting strike a few years ago and it took out the TV, fridge and BT equipment (insured luckily) but I have been led to believe we MUST fit SPDs on new installations now. If I'm advised that they are not suitable in my property whats the point, Iwill therefore not be complying with the wiring regs. Im puzzled. What are your thoughts please.

Hi there, quick question please. I’m looking to purchase a Proteus 100A DP Electricity Meter Isolator Switch with T2 Surge Protection for my house. Does the regulation still apply in regards to the tails being 0.5mtr-1mtr for this device as is an isolator switch and SPD combined?

there was two earth terminal at SPD. Do we need to connect to both PE & E at the same time?

Question: Do I understand it correctly that spd has it own 15amp( b-curve?) “fuse”, in that case the cable length of the fase bare through the “fuse” need to be added to the total length (correct?)……

how to specify the proper rating of SPD type one like maximum continuous operating voltage ,nominal discharge current and voltage protection level (Up) for the three phase four wire system (230/400) with TT earthing system ?

Install the SpD enclosure right next to the DB and use bush and locknut . All good

Hey I'm from the UK and Im interested in an apprenaship in the USA. I was wondering if I could hrt your opinions on my situation. And what you might suggest

Dear sir u used spd near the main circuit breaker sum time hi surge in come spd spd is damag then all mcbs is damages ??????

At 3:46 you measure the length of earth, isn't that arbitrary as there is a length of wire from the earth bar to the Main fuse then to the neutral.....etc. I'm not sure what the 500mm is for and what is the effect of a longer path. Is it just the common earth point of the other circuits?

Could used bushes, that looks like one of my pj

When IR testing a consumer unit with integrated SPD, do you have to disconnect the SPD when applying 500 VDC?

So are SPD’s required in a domestic dwelling? Or should we ask the IET?

If after a risk assessment it is decided a SPD is required and considering it would then be assumed that a TOV would occur then given that these are single use components it would therefore follow that the installer would likely be required to have on hand a replacement so it is highly likely that the cost would need to include said spare, and in the event of a TOV occuring post install a further SPD would need to be obtained ad infinitum, run that past joe public and I know what the result will be, personally if TOV,s are likely then it should be down to the DNO to provide protection to their customers and if that were indeed a requirement this whole issue would vanish without trace

can you install a spd from an rcd supply i never thought you could the reason being the let thro current it trip before the spd see the transient a type ac or a does not offer 3ka/20micro seconds current wave a type akv,f,b,ev will tho

think you could check that hight tourque setting

so on a hager board with opre fitted spd the earth of the spd is pre wired and connected to the earth bar but the other terminal p/e is empty ???

9-slot DB reduced to 5-slots available. How about next week's regulations? Another two slots gone so another DB replacement. Those wires must be getting a bit work hardened by now with all the DB replacements... so let's rewire. Best just to ban electricity altogether. I mean, come on, it can kill! That's my risk assessment done.

Maybe I’m missing something here but Wondering why spds on anything other than on tt systems do we need both line and neutral protection. In tncs and tns the neutral and earth are connected before entering the Cu. Some spds take up two modules in the cu where space is often precious . I’m thinking connecting the spd to neutral is basically already done. Thoughts please

AM I OVER CAUTIOUS AS I HAVE 16 AMP IN MY SHED COME WORKSHOP AND HAVE ALWAYS USED 4MM CABLE AM I OVER DOING IT?

If the torque screw driver manufacturers made the screw driver handle a T-bar type it would help the user terminate high torque settings.

Why didn't you just mount the SPD box against the main DB and then use a bushing to mechanically join the boxes, you can then push your cables through the bushings. Easy as pie

How much would it cost to have an SPD installed?

It doesn't actually have to look good, it just needs to function properly! I'd argue that for such a short run between enclosures, there's not much need to leave masses of slack as the wire could be easily replaced if it ever needed to so.

I always thought they were called *_consumer units_* rather than *_consumer's units._* Can they *_really_* be called *_either ?_* Please clarify, thanks. >

If I notice the customer has a high end computer like an Apple 27” I would recommend an spd on that alone.

Wonder how many heads will be destroyed at that torque

👍🏼👍🏼👍🏼

Bloody hell, these spds have opened a can of worms,I’m not going to bother until they are incorporated as standard, hopefully I’ll be off the tools by then.

Should have used couplers to combine both enclosures, looks pant's using stuffers

Why braker to spd? It doesn't carry any current..

Can't help but think that the easiest way to compare the installed wiring to a 500mm or 1000mm length of conductor would've been to actually offer-up a 500mm or 1000mm length of the same conductor to the installation. Maybe it's just me but seeing metal tapes anywhere near electrical equipment - even equipment that's not-live - is a no-no!

👍🌟🌟🌟🌟🌟

Why is it not good practice to clip it to the din rail inside the main DB, Surely that’s a better practice than exceeding the maximum length of run.

The torque screwdriver effort is "All in the wrist action" - Just like the game "Battling Tops" from the '70's. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mWFwzDJaeKw.html

Should have reduced the earth distance by installing a terminal block in the remote box

May

Gaz - Heading miss spelt. "How to Fit a Type 2 SPD Remote form the Consumer Unit" - Should be FROM not form. Cheers.

Why the hell does it need to be so tight? It's not like there's any weight or tension on those units. Seems ridiculous!

Does anybody really have a clue about these SPD's? It's seems to be mass confusion all round, and hardly any information.. Upstream or down stream of the mcbs, rcds..? One module or two?.. Different for TT/TNCS?.. How the efffing things actually work..? Different types of spd?.... Remotely or in the board?.. but no spare ways? Perhaps some decent wiring diagrams might help, but there aren't many about..

He hasn’t answered the question do we need an sod in a normal household

May Eceltical pattycall

There can't be possibly any good reason the conductors have to be so short other than pushing people into have a board change with an integrated device.