Replacement shower

[keniff]

If your replacing a shower like for like power wise, are you under any obligation to supply rcd for this? As no alteration has been made to the circuit and no change of opd has been done?

 

[Paul.M]

This Q & A is taen from the ESC web site:-

"Q2.10If I replace an existing electric shower, do I now have to provide RCD protection for it?

No, unless RCD protection is required by the manufacturer’s installation instructions, or a new circuit is required (to provide for increased load, for example).
Regulation number(s)

• 134.1.1
• 510.3"

2. Alterations and additions in domestic and similar premises : Electrical Safety Council

Q 2.10

 

[telectrix]

the correct procedure is to connect up the new shower to the leccy first, then get the plumber to do the water bit. only after the plumber has been electrocuted, should you return to fit the RCD.

 

[MDJ]

Spinlondon spin on this lol rrr:

 

[onions1066]

MDJ lol I don't think spin has read it yet :13:

 

[keniff]

I don't get the little blue sofa lol?

 

[onions1066]

They are in all good furniture stores, as rcd's are in all good compliant shower installations lol

- - - Updated - - -

They are in all good furniture stores, as rcd's are in all good compliant shower installations lol

 

[keniff]

Lol depends what instructions you look at the one in the box or the one you have to search for online :/ lol

 

[onions1066]

Well if it was in the box it would be way to easy. Where's the challenge in that?

 

[Octopus]

This is so so so boring now. I'm off for a (rcd protected) shower. lol

 

[keniff]

Go and bask in the 30ma lol!

 

[Deleted member 26818]

Spinlondon spin on this lol rrr:

Just for interest I contacted Mira this morning asking them about their views on RCD protection with showers. I used the extract Spin (I think) posted from a Mira product guide. It seems that their view is that an RCD must be used

Read more: http://www.electriciansforums.net/e...69843-replacement-shower-5.html#ixzz2H1ME8P4L

- - - Updated - - -

Thanks richy3333 for previous post

This is the latest offering from Mira:
Electrical (checklist in detail)
1.
In a domestic installation, the rating of the electricity supplier's fuse and the consumer unit must be adequate for the additional demand. All Mira Sport electric showers are high power units, therefore it is essential to contact your electricity supplier to ensure that the supply is adequate for the product. Voltage drop due to local heavy demand will reduce the shower's performance.
2.
The Mira Sport must be earthed by connecting the supply-cable earth conductor to the earth terminal.
Supplementary bonding:
Within the bathroom or shower room, all accessible conductive parts of electrical equipment and extraneous conductive parts (metal parts) that are likely to introduce earth potential, must be electrically bonded to earth using a minimum cable size of 4.0 mm2 if the cable is not mechanically protected, (2.5 mm2 if mechanically protected).
3.
Supply cable - see opposite.
4. As a guide only
, and in accordance with BS 7671 we recommend close circuit protection: i.e. 7.5 kW & 9.0 kW = 40 Amp, 9.8 kW = 45 Amp
5.
A 30 mA Residual Current Device (RCD) MUST be included in the electrical circuit (BS7671). This may be part of the consumer unit or a separate unit.
A separate, permanently connected supply is taken from the consumer unit to the appliance through a double-pole switch, which has at least 3 mm contact separation. The switch can be a ceiling mounted pullcord type within the shower room or a wall mounted switch in an adjacent room.
6. DO NOT
twist the individual cable cores of either the live or neutral conductors, as this will prevent them from entering the terminal block.
7. DO NOT
exert strain on the terminal block. Ensure that the electrical connections are tightly screwed down.
8. DO NOT
turn on the electrical supply until the plumbing has been completed.

You may think that the sentance "A 30 mA Residual Current Device (RCD) MUST be included in the electrical circuit (BS7671)." is an instruction for you to fit an RCD.
It's not.
It's rather poorly informing you that BS7671 requires the circuit be provided with 30mA RCD protection.
Just the same as No. 2 is incorrectly informing you that Supplementary bonding is required, and how to provide it.
Would you or anyone else fit supplementary bonding if it were not required by BS7671, just because the Mira installation electric shower instructions tell you to?

 

[richy3333]

the correct procedure is to connect up the new shower to the leccy first, then get the plumber to do the water bit. only after the plumber has been electrocuted, should you return to fit the RCD.

Thanks Tel' that made me chuckle after a stressful afternoon with a plumber

 

[onions1066]

Even I'm bored of this one now

 

[Stroppy]

Last year I found I had been using my electric shower (8.5kw Mira) with no earth AND no RCD protection for the last ten years!

 

[UNG]

Last year I found I had been using my electric shower (8.5kw Mira) with no earth AND no RCD protection for the last ten years!

Were you shocked when you found out