T2 Part 11 Multicore Cables & Cabletray

Question 1

Volt drop in cables will be decreased if?

Answer 1

the CSA of the cable is increased

Question 2

What material is used to protect cut tray edges against corrison?

Answer 2

Zinc Paint

Question 3

NYM-J cable should not be worked below …….?

Answer 3

5 degrees

Question 4

The insulation of fire performance conductors can consist?

Answer 4

Silicone Rubber

Question 5

Volt drop in cables will be decreased if?

Answer 5

load current is decreased

Question 6

Why can the armour of a SWA cable cannot used as a protective conductor?

Answer 6

The CSA of the steel wire armour is too small in some cases

Question 7

With regards to the ETCI rules, what temperture is regarded as ambient temperture?

Answer 7

30 degrees

Question 8

Should a bonding ring be used when terminating a SWA into a non-metallic enclosure?

Answer 8

Yes

Question 9

Volt drop in cables will be decreased if?

Answer 9

the lenght of the cable run decreases

Question 10

According to the ETCI rules, the maximun volt drop permitted in a public low voltage lighting system is?

Answer 10

3%

Question 11

According to the ETCI rules, the maximun volt drop permitted in a private low voltage socket circuit is?

Answer 11

8%

Question 12

Power losses in a cable can be found by what formala?

Answer 12

I2r