to fuse spurs on the system

[gasman1987]

2 fuse spurs on the system, what u think?

vaillant with a vr 65 wiring centre (for all who don't no it is a wiring center with a pcb just plug and play) 1 fuse spur to power the boiler and 1 to power the vr65 and controls and they are interlinked via ebus


blinking sparky, what a quick job

all i can do is lol and the customer don't want the floors to be touched so what can you do

 

[simond]

Not a problem, perfectly acceptable.

Why do you think it is not OK?

 

[gasman1987]

it ent labled as having it and i realy don't think there should be 2 sbecause you will get different paths from different circuits unbalanced load on the circuits and fuse board

nealy sounds like i no what i'm on about

u probably no i'm blagging it but still i think what i said

 

[gasman1987]

might post in electrical side see what they say as well ,lol

 

[kittedup]

That was how they all used to be wired a few years ago.

One for the boiler, one for the wiring centre.

Just cause you haven't seen something before doesn't make it wrong.

Ted

 

[gasman1987]

it dose it is bad practice
there is a potential for a electric shock

they need a rope and horse

please don't say you do it

 

[gasman1987]

don't get me wrong i would not rip every think up and run it in on 1 spur

but i would advice it is better to and mention it to the cutomer it ent very gd and let others know about the 2 spurs

 

[bazdaman]

seen loads like it, there is no risk of shock if you use a multimeter to prove safe isolation

 

[gasman1987]

yh but what if the pcb malfunctions on any the pcb or boiler there is a posability of 230 going through the ebus and most would not think there are 2 fuses

most want look fore safe isolation they just strip and rip ...... then nice new hair style , i like it spiky

 

[kittedup]

No I don't do it. Just pointing out that was how it used to be done.

I don't fit back boilers but I don't do back flips when I work on one now either.

Ted

 

[bazdaman]

i personally dont like two spurs on a system as its not good practice. people will still just rip wiring out without testing until they get a belt

 

[gasman1987]

i'm getting ur points

 

[dumbrill]

it ent labled as having it and i realy don't think there should be 2 sbecause you will get different paths from different circuits unbalanced load on the circuits and fuse board

nealy sounds like i no what i'm on about

u probably no i'm blagging it but still i think what i said

If you're worried about the Ebus connection unbalancing the RCDs on the two separate circuits then I don't think this will be a problem because the Ebus connection is a data connection only. It shouldn't take any current.

An analogy would be a PC on the upstairs ring main and a PC on the downstairs ring main. If you connected the two together on a wired network you wouldn't expect the RCD to trip. If this was a problem there would be a big issue with 17th Ed boards that divide the ring mains onto two RCDs and the use of PCs and networks.

Also because the Ebus is not a power connection I don't think the issue of leaving one half of the controls live because one spur is unknowingly left on is a concern.

 

[namsag]

Potential killer and should not be done like that.

 

[dumbrill]

Excerpt from VR65 manual:

Untitled

• dumbrill
• 19 Dec 2010
• 1

There is no 230V link between the boiler and VR65.