Is my wiring setup okay?

[telectrix]

course it should. a simple scheme similar to gas safe would be far better. but it's all about money. the scam organisations are raking it in whilst doing nothing to improve standards, but encouraging customers to use cowboys as they can do the work cheaper, not having to fork out hundreds for scam membership.

 

[Des 56]

]won't be in a week's time[/B].

That depends if you live in Grand slam country, or the country where runners up come from :clap:

 

[telectrix]

can't have it all des. what was the score again? factor of 10, i believe.

 

[Guitarist]

won't be in a week's time.

Point taken tel. So pretty much back to how it used to be, but still just enough left notifiable to keep the schemes going.

 

[Des 56]

can't have it all des. what was the score again? factor of 10, i believe.

You may be right tel,I will try and work it out
here is my maths (the figures in bold are for clarity only )lol

Wales scored 30
England scored 3,
(that's not one of my usual typing errors by the way,it is only three 3 )

So if we divide the single figure 3 into the much larger 30 we do have in fact a 10 points to 1 ratio
so the factor of 10 is valid

It's just as well the larger figure stayed at 30,yet another 5 points would have made it hard to work out :yes:

 

[vince]

The ring is protected with a RCD at the CU. I decided to place another RCD at the outside interface because if there is a fault outside, it will not take out all the sockets.
The switching time is faster on the outdoor RCD.

The Wagos are very small but point taken, it maybe quite a bit to fit in the double socket box.

The local authority are visiting in a few weeks to inspect the install.

 

[Engineer54]

The ring is protected with a RCD at the CU. I decided to place another RCD at the outside interface because if there is a fault outside, it will not take out all the sockets.
The switching time is faster on the outdoor RCD.

The Wagos are very small but point taken, it maybe quite a bit to fit in the double socket box.

The local authority are visiting in a few weeks to inspect the install.

What do you mean ''if there is a fault outside it won't take out all the sockets?? If your addition is supplied from a RCD'd protected circuit, it will take out everything on that circuit!! If you believe the outdoor RCD device will trip before, the upstream RCD, or won't take them both out, you have a lot to learn about RCD discrimination, among other things as far as i can make out!! lol!!

 

[Guitarist]

Agree with Eng, you will most likely loose both. Are you actually an electrician, or an enthusiastic DIY'er, just out of interest?

 

[vince]

An enthusiastic engineer.
By using a faster switching rcd on the outdoor side, discrimination can be achieved.
Why do you think both rcd devices will trip?
The test on the unit itself does not affect the ring however i don't think this is a test in itself.

 

[Engineer54]

All RCD's are manufactured to exactly the same BS/European standards, with the same tolerances, there is no such thing as a faster tripping RCD to my knowledge. Discrimination between two RCD devices in series can only be achieved, by a time delay at the upstream RCD (S type RCD) A typical earth fault on a circuit will be far in excess of the 30mA rating, and even the 5 times test value (150mA) so you can bet your bottom dollar that the chances of taking out both your serried RCD's is High!! lol!!

 

[Des 56]

An enthusiastic engineer.
By using a faster switching rcd on the outdoor side, discrimination can be achieved.
Why do you think both rcd devices will trip?
The test on the unit itself does not affect the ring however i don't think this is a test in itself.

Knowledge and experience
Maybe its time to get the books out :yes:

 

[markc123]

This isn't going to help, but - i can't help but think the OP is over complicating the situtation.

Just get the job done lol. But yeah, about the RCD series situation...read 531.2.9 and also reference it alongside 314.1(iv)

 

[Guitarist]

An enthusiastic engineer.
By using a faster switching rcd on the outdoor side, discrimination can be achieved.
Why do you think both rcd devices will trip?
The test on the unit itself does not affect the ring however i don't think this is a test in itself.

I think eng summed it up nicely. In fact, to take it further, you will most likely lose the indoor RCD first anyway due to the fact that there may well already be some leakage on the system, especially if you have IT equipment plugged in.

 

[SimpleSimon]

4 core because i can have 2 independently controlled sets of lights. I have also chosen to have 1 core as earth in addition to the armour.

That doesn't make sense as you stated you've earthed both the cores?!? So are you just using four core because you have it spare lying around?

Also is the SWA earthed correctly with the proper glands? What does the rest of the SWA around the garden feed?

ps. Yes it is acceptable to use singles in conduit.

Tel- I thought the Part P changes only applied to that of a kitchen that doesn't need notifying?

 

[vince]

Good points on cu rcd. I will investigate this.

Swa cw gland terminated correctly comes into the socket box on 4 core with 2 cores earthed as one is spare. Going around the garden, one of the cores is then used as the second switched live.
The swa goes to a 3way ip68 jb, one to the light fitting and the other to the next jb.