Electrical work at £1386...

Risteard

Ebe_Scrooge wrote: »

But most of these jobs are DIY items, or at worst a trivial job for a real sparky

You don't know that. We don't know if these are non-sheathed singles cables or not.

If they are they need a proper containment system installing which most certainly is not trivial and will be time-consuming and costly. Even if they are insulated and sheathed multicore cables which have had the sheath stripped excessively then this all needs to be properly contained. Without photographs or surveying the job you are absolutely in no position to comment how big a job this is.

krey

My dad is an electrician and I can do all of the stuff as well even I'm not ''certified'',
looks like a bit less than £150 in materials and half a day work for someone, do the math.

Risteard

krey wrote: »

half a day work for someone, do the math.

We don't know how much work is involved without seeing (or being given answers to) the nature of the installation and its condition.

greenface

Risteard wrote: »

You probably couldn't do "simple trunking" if it needs to be a proper containment system suitable for non-sheathed singles and if galvanised providing an earth path.

Also "bonding earth" makes no sense - earthing and bonding are completely different things.

then its not simple trunking is it . Ive recently had my 3 bedroom house completely rewired for just under 2k inc a new upgraded RCD . come on 1.3k for this is expensive

baldelectrician

jashton wrote: »

1. Upgrade main gas and water bonding (from 6mm to 10mm)
If the bond exists and there is continuity < 0.05 ohms to then it is deemed satisfactory

2. Re-fix 2 x sockets to the wall in the lounge
< 1 hour

3. Install trunking over exposed single insulated cables in kitchen
< 1 hour

4. Replace 3cracked socket in bedroom
< 1 hour

5. Replace bathroom pendant light fitting in the bathroom with bathroom rated fitting
< 1 hour
6. Install trunking over exposed single insulated cables in the bedroom cupboard
< 1 hour
7. Replace existing consumer unit with Dual RCD Amendment 3 board
£400-£500 approx.
8. Install trunking over exposed single insulated cables in bedroom
< 1 hour

9. Install mechanical protection over single insulated cables in consumer unit cupboard
< 1 hour

Costs
Trunking about £5 per length - 3m long so allow £25
Less than 6 hours work 6 x £40= £240
Add consumer unit £450
Add IP LED bathroom light £25


All in less than £800

Seems a bit costly, unless there is not something I don't know


Have a look at the inspection and testing best practice guide
http://www.electricalsafetyfirst.org.uk/mediafile/100404922/Best-Practice-Guide-4-Issue-4.pdf

Risteard

greenface wrote: »

then its not simple trunking is it .

Yes it absolutely is, given that trunking is designed to be used as (or as part of) a complete containment system for non-sheathed cables.

Risteard

baldelectrician wrote: »

1.If the bond exists and there is continuity < 0.05 ohms to then it is deemed satisfactory

No it isn't. BS 7671 does not mention 0.05 Ohms - this reference in IET Guidance Note 3 (Inspection & Testing) is to demonstrate a good connection with the clamp itself and the extraneous conductive part and bears no relation to the impedance of the main protective bonding conductor itself which is purely a product of its length and cross-sectional area.

Also 6mm^2 may not be satisfactory if there is evidence of overheating, and is not actually permitted for TN-C-S installations which must be a minimum of 10mm^2.

baldelectrician

Risteard wrote: »

No it isn't. BS 7671 does not mention 0.05 Ohms - this reference in IET Guidance Note 3 (Inspection & Testing) is to demonstrate a good connection with the clamp itself and the extraneous conductive part and bears no relation to the impedance of the main protective bonding conductor itself which is purely a product of its length and cross-sectional area.

Also 6mm^2 may not be satisfactory if there is evidence of overheating, and is not actually permitted for TN-C-S installations which must be a minimum of 10mm^2.

From best practice guide - page 18


A 6mm bond is listed as a non-compliance that does not give to danger. The regs state that a main bond should be 10 mm minimum now but the regs are not retrospective and a 6mm bond may be deemed fine if it shows no sign of deterioration


Some TNC-S installs have a 6mm bond but are still serviceable


It is good practise (and is required in a EICR) to perform a continuity test on a main bond - that's maybe why an electrician has to tick a box saying they have continuity tested a bond