What’s the going rates for the below instalation

[Les wiseman]

Hi just starting out working for my self after 10 years on the rail and I’m at a total loss at what the going rates are I don’t want to go in to high .I have been asked price up to Run a supply to a Bar in a garden, but due to the location of the distribution board in the house It would be easier to install a enclosure next to the meter And split the meter tails . The run is 35m to the bar so I was going to install a 6mm SWA cable protected by a 50amp 100m/a RCBO then install a 4 way DB with a 40amp 30m/a RCD mainswitch in the bar with a 20amp radial with 5 x double sockets 1 x lighting circuit. Any advice would be greatly appreciated

 

[ChrisElectrical88]

No need for the 100mA RCBO house end if its in SWA

 

[Les wiseman]

Only reason I was going to install the 100m/a was to help with the discrimination from the 30m/a in the bar

 

[Yozza19]

Are you sure you have sized the cable correctly

 

[MJPD29]

No need for the 100ma rcbo and at 35m I make it 10mm for a 50a

 

[Yozza19]

10mm is good for 47 amps at 35m for 50a ocpd you have stated a 16mm would be required

 

[Les wiseman]

6mm SWA can take up to 54amps so that why I have gone for the 50amp RCBO

 

[ChrisElectrical88]

I also make it 16mm required for 35m 50A Load.

 

[littlespark]

Did someone mention a bar?... mines a pint

 

[Les wiseman]

Hi Guys thanks for the advice I will re do my cable calculations

 

[TJ Anderson]

Why are you sizing cable for 50A capacity?? Ib for distribution circuit .....approx 22A

1. 20A for socket outlets as could be fully loaded so base on MCB,
2. Say.......2A for lighting

Protective device only needs to be equal or greater than design current ....

16mm for a 22A Ib 35M away.......No!

6mm is more than enough for CCC and VD. Zs for ADS you can work out as I don't know your Ze.

As already said don't RCD front end. 30mA Main Switch RCD in sub board. Put B40A on dist circuit as it is the highest you can go and will discriminate better with the B20 in sub board on SC'S.

 

[sinewove]

Hi Guys thanks for the advice I will re do my cable calculations

Assume you mean a type S rcbo to discriminate against the 30ma in the bar?

 

[Les wiseman]

Why are you sizing cable for 50A capacity?? Ib for distribution circuit .....approx 22A

1. 20A for socket outlets as could be fully loaded so base on MCB,
2. Say.......2A for lighting

Protective device only needs to be equal or greater than design current ....

16mm for a 22A Ib 35M away.......No!

6mm is more than enough for CCC and VD. Zs for ADS you can work out as I don't know your Ze.

As already said don't RCD front end. 30mA Main Switch RCD in sub board. Put B40A on dist circuit as it is the highest you can go and will discriminate better with the B20 in sub board on SC'S.

Hi TJ thanks

 

[MJPD29]

6mm SWA can take up to 54amps so that why I have gone for the 50amp RCBO

How did you work this out? I'm very interested to know

 

[Les wiseman]

Hi TJ thanks

Hi TJ
What would be the going rate to charge for this job as I stated after 10 years on the rail I really dont know what the rates are now