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[quote name='Andy

Wagos are designed to save time. They are also designed to connect 2 or more wires together as with a strip connector. To say there should be a Wago with just one entry is like saying there should be a strip connector with entry on just one side :D

How about a forum sponsor ISSWWW. Have a word with megger mark. He may sort you out with a discount if you mention you're a forum member.

Just use a normal strip connector.

So how do you explain Zs = Ze + (R1 + R2) ;)

I was thinking of putting surround sound ceiling speakers in when I rewire. I have just got to thinking how you would comply with Parts B & E. Anyway, just done a quick Google and found THIS. Maybe of use to you.

Try this =IF(CELL("type",D2)="b",0,LOOKUP(D2,$A1:$A21,$B1:$B21)) If Cell D2 is blank ("b") enter 0 else perform LOOKUP. If you want to leave it blank instead of having the 0 replace the 0 with ""

How old is the boiler? I used to work for Ideal Boilers about 7 years ago (I live just round the corner) and remember they had a lot of recalls because of dodgy PCBs. I think they were getting them from China then (say no more :innocent ). A lot of people got laid off when British Gas...

I would have to disagree. 410.3.3 In each part of an installation one or more protective measures shall be applied, taking account of the conditions of external influence. The following protective measures generally are permitted: Automatic Disconnection of supply (Section 411) Double or...

Big Red Book (BS 7671 17th Edition)

Because the voltage range in the UK is 230V +10% -6% (216V to 253V)

electrician.co.uk & xjmelectrical.co.uk would be the same price. It's the .co.uk you are paying for. A .com would cost more than a .co.uk but the bit before makes no difference.

Yer. Mine's got 19 LEDs. Don't know where they got 7 from. It's got 3 brightness levels and a flashing mode.

Sounds a bit like mine.

Rob...the 1533Ω is for a supply voltage of greater than 230V and less than 400V (230 < Uo ≤ 400). This is because a circuit not exceeding 32A with a supply voltage within the above range has a max disconnection time of 0.07 seconds or 70mS (Table 41.1 page 46 BRB). For a 30mA RCD to trip...

Are you referring to this: The alterations seem to have only been made to the > 230V and ≤ 400V column. The 230V column remains the same.

Yes you could. I was just using 30mA as an example as they are the most common. The values in Table 41.5 are to ensure that touch voltage does not exceed 50V (50V

Good explanation a1spark. Just a quick follow up question to see if I've got this right. Let's say you have a 10kW shower on a 45A Type B breaker. Fault current for instantaneous operation would be 225A (45 x 5). Would this mean that the reading between the shower and any other conductive...

Theoretically for a maximum disconnection time of 1 sec you would need a fault current of 30mA because the RCD should trip out in ≤ 300mS at it's operating current. Therefore your theoretical max Zs on circuits over 32A is 7666.66Ω 230

In blue