40A Isolator MetalClad or ABS

[Spike1947]

And this statement:
Sunbed/Vertical Tanning Unit Electrical Specification Fuseboard: Lie down sunbed: Single phase: Three phase: 80 Amp MCB 3 x 35 Amp MCB Vertical Tanning Unit: Single phase: Three phase: 100 Amp MCB 3 x 35 Amp MCB Residual Current Device (RCD/RCB/RCBO) is optional, but if fitted must be 100mA trip, not 30mA. Cable Single phase: 18mm Twin and Earth (Lie down and vertical sunbeds) Cable 3 Phase: 3 x 4mm (Lie down sunbeds) 3 x 6mm (Vertical sunbeds)

 

[Spike1947]

The part were it says use a 100mA trip as apposed to a 30mA !!

 

[pc1966]

The part were it says use a 100mA trip as apposed to a 30mA !!

Not uncommon for high power things. It is not to protect you here, it is usually for fire provention or in cases where it is a TT supply (earth rod, not a low resistance cable back to the supply).

 

[Spike1947]

Well people will be inside the vertical Sunbed !

 

[pc1966]

Well people will be inside the vertical Sunbed !

That is what the earth is for.

They are normally hard-wired, or use "commando" style plugs and sockets at that point so the earth/CPC should be reliable.

 

[Spike1947]

Yes it is hard wired, they also say use a class C mcb/rcbo !

 

[pc1966]

That would be C-curve trip characteristic in those cases, usually means a high switch-on surge.

• B-curve = 3-5 * In (rating current) for the "instant" magnetic trip
• C-curve = 5-10 * In
• D-curve = 10-20 * In

 

[Spike1947]

That would be C-curve trip characteristic in those cases, usually means a high switch-on surge.

• B-curve = 3-5 * In (rating current) for the "instant" magnetic trip
• C-curve = 5-10 * In
• D-curve = 10-20 * In

Yes , but why would a Sunbed need a C -curv as opposed to a B- curv and a 100mA trip as apposed to a 30 mA trip !

 

[pc1966]

Yes , but why would a Sunbed need a C -curv as opposed to a B- curv and a 100mA trip as apposed to a 30 mA trip !

The C-curve is probably due to the inrush current of the inductive starters for the UV tubes. The 100mA probably from having several of them each with some noise filtering.

If it is hard-wired and no issues with the cables being buried < 50mm then you don't need the RCD aspect. So if run in cable is definitely >= 50mm, or in trunking, or using SWA or (at lower currents) Flexishield for protection against penetration damage causing a shock risk, then you can just use the MCB.

Getting 3-phase RCBOs can be difficult, sometimes easier to have a MCB at the board and a separate RCCB for the RCD action.

 

[Taylortwocities]

You’ve already posted this on two other forums. Didn’t you like the replies on there?

 

[Spike1947]

You’ve already posted this on two other forums. Didn’t you

You’ve already posted this on two other forums. Didn’t you like the replies on there?

You’ve already posted this on two other forums. Didn’t you like the replies on there?

Is that a problem !

 

[Spike1947]

You’ve already posted this on two other forums. Didn’t you like the replies on there?

The above statement is from a pdf document, supplied by the Sunbed supplier, not from me !, attached is the full pdf.

cheers
Spike

 

[James]

Spec says. 63A rotary isolator must be fitted
Rcd is not required so don’t bury cable .

 

[Spike1947]

Spec says. 63A rotary isolator must be fitted
Rcd is not required so don’t bury cable .

RCD is going to be fitted just outside of the phase supply, am going to fit the rotary isolator at other end were it will terminate in the roomwere the bed will be located , then connect the sunbed direct to the rotary switch

 

[Spike1947]

Have decided it is not going to be within the house cicuit ( Blue phase) , am taking a feed from one of the phases ( Yellow phase ) in another part of the farm building, and putting it in a room within the farm building, where we have set up has a training/weight lifting etc room , the 3 phase feed to the farm is a TT system, there is several earth rods around the buildings .

Spike

 

[Zlodej]

Use the Contactum one not that Europa rubbish.

They are probably both made in a same Hong-Kong factory anyway
Strictly speaking I find Contactum more prone to fault then any other brand (Yes MK and wylex may give me most failed RCDs, but they are used far more often so that is natural). Although I find the paint from the otherwise well build Contactum metal box tend to start pealing within a first year in all four Contactum boards I have fitted.
There is the fact that the problematic MK main switch few years ago was made by Contactum and so where the series of problematic WYLEX RCDs (Which had a feature that if you push it less sensitively up, it stays on less sensitive).
I am not sure if it is any better then any other brand at all (maybe better then LVE). I am yet to find mine first failed chint MCB or RCD, yet I have seen quite few of their (mostly 3F) boards.

 

[Spike1947]

This is what I am thinking of putting in .

 

[James]

This is what I am thinking of putting in .View attachment 64721

You need to find an electrician
That is not a 63A rotary isolator
Nor is it a 100mA rcd

 

[Spike1947]

Rotary switch will be fitted in the room where the Bed will be located, then the Bed will be hard wired to that, am going to try it with a 30mA RCD, feel better with that protection than a 100mA .

 

[James]

The instructions tell you what supply is required
Also what protection to fit.

You seem intent doing it the way you want to.
You will not find someone here to back up your incorrect design.

I am unsure what further advice can be given.