Electrician Jobs Installing a secondary consumer unit in the garage??

[davesparks]

I am an engineer by profession and have a welder, lathe and mill. I need a sub main, socket outlets and lights. Potentially a higher rated fused outlet for a welder. If i were to add more sockets or lights I would hope its something I can do without need it signed off again? As long as I am not adding another circuit to the sub main?

I assume in the garage I can just run the twin and earth clipped straight to the single leaf wall or through conduit?

All electrical work should be carried out in accordance with BS7671, this includes inspection, testing and certification of the work. Notification for the purpose of part P however wouldn't be required for the extension of the circuits if not in a special location.

Clipped direct cables would not be appropriate to the workshop kind of environment, I think the most suitable option would be steel conduit due to the risk of damage to the cables from weld spatter, metal chips and general moving of materials and heavy tools.

 

[David M]

The welder will be pulling 45 Amps, just checked and the power is 11kw

I assume this is an arc welder? It will most likely require hard wiring into an appropriate rated isolator. During use of the welder you may notice a voltage drop which will cause lights to annoyingly flicker. Long continued use will cost you dearly in your electricity bills. (just some friendly advice)
From experience, if you intend to use this as a "professional" workshop then be aware that the council/authorities may get involved and you will require planning permission.

 

[Loki]

Hi,

Where did you get that 100 Amp from?
If it was on the dno's main fuse housing then the fuse inside could be less.
As your not ment/allowed to pull the main fuse "but people do i know lol" you would need to call you supplier & confirm this.

Michael

 

[Loki]

Deleted double posted for some reason

 

[TheDoctor]

Hi,

Where did you get that 100 Amp from?
If it was on the dno's main fuse housing then the fuse inside could be less.
As your not ment/allowed to pull the main fuse "but people do i know lol" you would need to call you supplier & confirm this.

Michael

Why do I need to know this?

 

[Octopus]

^^ very simply if it's a 60a then the combined load of the house and garage could easily blow out.

Me thinks you need to consult a decent local spark.

Where are you based?

 

[FatAlan]

Sounds like a good workshop. You're not Colin Furze by any chance?

 

[TheDoctor]

^^ very simply if it's a 60a then the combined load of the house and garage could easily blow out.

Me thinks you need to consult a decent local spark.

Where are you based?

Ah I see. Well I was applying the rules of diversity and the fact I dont have one electric shower or similar in the house so the welder basically pulls a similar current. My showers and rads are all gas. The 100amps came from the fuse located near the meter and the main switch in the consumer unit.

 

[TheDoctor]

Sounds like a good workshop. You're not Colin Furze by any chance?

I can only dream! Well its my first house and the garage is big enough for a decent workshop. I am employed full time so main use will be home projects.

 

[Octopus]

100 a on a main switch is normal and 100 a on a fuse carrier gives the max rating so nothing can be assumed...

 

[TheDoctor]

100 a on a main switch is normal and 100 a on a fuse carrier gives the max rating do nothing can be assumed...

I see. well my current housing circuit has two 80 amp RCD's

 

[Pete999]

Why do I need to know this?

Thought "The Doctor" knew everything, are you sure this isn't a neww bit of kit you're installing in the "Tardis" if you're doing it yourself make sure you torque the connections with you Sonic screwdriver.

 

[Octopus]

I see. well my current housing circuit has two 80 amp RCD's

Which also means nothing helpful

 

[TheDoctor]

Which also means nothing helpful

How can I find out the actual rating?

 

[Midwest]

How can I find out the actual rating?

For the main fuse #18