Spur for a dishwasher connection

[Mr.Fixit]

Hi, i am installing a Dishwasher and need to make a Electrical connection for it. Should i go for a Fused connection for it??? Also, as i understand, the wire to be used is a 2.5mm., but isn't that 16amp and the ring main is 13amp from where the spur will be taken? Sorry but i am still in the learning phase. confused. Can anyone help???

 

[Steve]

2.5mm² cable is rated at 27A optimum. bury it in thermal insulation and half the rating. The ring main is rated at 32A. This is why you have 2 cables on a ring main - a possible 54A capacity, but 32A is the norm.

13A is the maximum rating of an appliance you can connect to a ring main, because this is the maximum rating of plug fuses.

Use 2.5mm² cable to make a spur from a socket on the ring main and put a single socket on the end of it. simplest way to do it.

 

[JohnD]

2.5mm² cable is rated at 27A optimum. bury it in thermal insulation and half the rating.

PVC flat 2.5mm in an insulated wall is 21Amps, I believe. And 20A if in a conduit inside an insulated wall.

 

[Steve]

2.5mm² cable is rated at 27A optimum. bury it in thermal insulation and half the rating.

PVC flat 2.5mm in an insulated wall is 21Amps, I believe. And 20A if in a conduit inside an insulated wall.

I know, i exaggerated, but i was making a point that the cable doesn't have a constant rating, and certainly not 16A.

 

[PompeySparks]

Thermal Insulation will halve the current carrying capacity if the cable passes through more than half a metre of it (The correction factor (Ci) is 0.5 for 500mm of Insulation and over)

EDIT: Whoops forgot to mention... the cable has to be fully surrounded!

 

[Mr.Fixit]

thanx guys....