fuse spur that will be used as power for a LED

[Aspiring elec's M8]

Hello, what would I need for the following...
A 40 meter cable run through fire partition walls, into a large plasterboard void to supply a switched fuse spur that will be used as power for a LED advertisement screen, unfortunately there's no forthcoming info on wattage.
what cable size would you recommend? Why?
what breaker type would you recommend? Why?
Thank you for your input/advice

 

[nicebutdim]

I don't think anyone would consider providing the information you request, but doing so will be impossible without details of the load in question.

The best advice I can offer is to use an appropriately sized cable of an appropriate type, protected by an appropriately rated breaker of an appropriate type and the best means of achieving this would be by engaging the services of a competent electrician.

 

[pc1966]

If it is a fused spur than you have a 13A limit, however, that might not be enough (you absolutely need to find out the overall load and any switch-on surge) and even then the cable & breaker size/type depend on the supply characteristics (Ze in particular) and the total length, so there is not a one-size-fits-all answer.

 

[Dustydazzler]

Site-Survery required Imo to work out cable size and ocpd

This is one of those jobs that could be a quick 1 hour job or right old faff that takes you hours.

 

[Rockingit]

You install to manufacturers instructions, simple as (with cable calcs to suit). However, given that personally I'd be looking at a B type RCD device then you'll probably need to consider this as a new circuit to allow for suitable discrimination.

 

[mainline]

And could well fall into being notifiable.

 

[Aspiring elec's M8]

I don't think anyone would consider providing the information you request, but doing so will be impossible without details of the load in question.

The best advice I can offer is to use an appropriately sized cable of an appropriate type, protected by an appropriately rated breaker of an appropriate type and the best means of achieving this would be by engaging the services of a competent electrician.

Thank you for taking the time to reply and for your advice

If it is a fused spur than you have a 13A limit, however, that might not be enough (you absolutely need to find out the overall load and any switch-on surge) and even then the cable & breaker size/type depend on the supply characteristics (Ze in particular) and the total length, so there is not a one-size-fits-all answer.

Thank you for taking the time to reply and for your advice

You install to manufacturers instructions, simple as (with cable calcs to suit). However, given that personally I'd be looking at a B type RCD device then you'll probably need to consider this as a new circuit to allow for suitable discrimination.

Thank you for taking the time to reply and for your advice

Site-Survery required Imo to work out cable size and ocpd

This is one of those jobs that could be a quick 1 hour job or right old faff that takes you hours.

I'm hoping for the former!
Thank you for taking the time to reply and for your advice

If it is a fused spur than you have a 13A limit, however, that might not be enough (you absolutely need to find out the overall load and any switch-on surge) and even then the cable & breaker size/type depend on the supply characteristics (Ze in particular) and the total length, so there is not a one-size-fits-all answer.

Thank you for taking the time to reply and for your advice

 

[davesparks]

And could well fall into being notifiable.

What makes you say that? It's pretty unusual for an LED advertising screen to be installed in a domestic installation.

 

[mainline]

What makes you say that? It's pretty unusual for an LED advertising screen to be installed in a domestic installation.

Unusual, but not unheard of.

 

[James]

What makes you say that? It's pretty unusual for an LED advertising screen to be installed in a domestic installation.

I sometimes wonder about a big one on the front of the house saying "DELIVER HERE" for when the delivery drivers are so lazy they cant find the clearly numbered house down a clearly signposted lane.
would be nice to tell them on the phone, look around, head towards the big flashing sign that says deliver here.

 

[nicebutdim]

I sometimes wonder about a big one on the front of the house saying "DELIVER HERE" for when the delivery drivers are so lazy they cant find the clearly numbered house down a clearly signposted lane.
would be nice to tell them on the phone, look around, head towards the big flashing sign that says deliver here.

I had a 3' x 2' sign made in red with white lettering to direct deliveries away from a front driveway, with the wording 'ALL DELIVERIES TO REAR', yet at least 50% of drivers ignored it. The rear yard was large enough to turn a 40' truck and it really ----ed me off when 7.5 tonners pushed their way under low hanging trees, so I'd explain that any damage caused by their exit would result in a claim and made them reverse back down the entire lane as there was no room to turn at the narrow front driveway. Most only made that mistake once, but a memorable few were particularly difficult to train.

 

[Dan]

Please use the like button to thank, like or whatever. As the forum treats that as a positive message then and uses it to score members.

Thank you for taking the time to reply and for your advice