T2 Part 11 Multicore Cables & Cabletray Flashcards
Volt drop in cables will be decreased if?
the CSA of the cable is increased
What material is used to protect cut tray edges against corrison?
Zinc Paint
NYM-J cable should not be worked below …….?
5 degrees
The insulation of fire performance conductors can consist?
Silicone Rubber
Volt drop in cables will be decreased if?
load current is decreased
Why can the armour of a SWA cable cannot used as a protective conductor?
The CSA of the steel wire armour is too small in some cases
With regards to the ETCI rules, what temperture is regarded as ambient temperture?
30 degrees
Should a bonding ring be used when terminating a SWA into a non-metallic enclosure?
Yes
Volt drop in cables will be decreased if?
the lenght of the cable run decreases
According to the ETCI rules, the maximun volt drop permitted in a public low voltage lighting system is?
3%
According to the ETCI rules, the maximun volt drop permitted in a private low voltage socket circuit is?
8%
Power losses in a cable can be found by what formala?
I2r