Welcome to your 18th Edition 60 mins
1.
What is the maximum operating current for an RCD, which may supply portable equitable used outdoor?
2.
Any overcurrent protective device installed at the origin of a circuit must have a breaking capacity of
3.
A radial final circuit feeding socket-outlets supplying several items of data processing equipment, has a total protective conductor current in normal service of 18 mA. This circuit must have a high integrity protective conductor
4.
A SELV source can be derived from which one of the following?
5.
A cable concealed in a wall outside the prescribed zones at a depth of less than 50 mm must?
6.
BS 5839 deals with the system design, installation and servicing of?
7.
The maximum value of voltage drop for lighting in a low voltage installation, supplied from a public distribution system is?
8.
BS 7671 relates to permanent and temporary installations for equipment on:
9.
What does the abbreviation PEI stand for?
10.
For an agricultural location, in order to provide automatic disconnection of supply in circuits other than socket-outlet circuits, a disconnection device shall be installed having a maximum rated residual operating current of?
11.
What will be the operating time for a 60A BS 3036 protective device when the value of fault current is 205A:
12.
An approximation of the prospective fault current between line conductors, of a 3 phase supply can be determined by?
13.
Equipotential bonding designed as a bonding ring network shall have a minimum round diameter of
14.
Class II equipment relies on basic insulation and
15.
A firefighters switch, shall be provided in the low voltage circuit supplying exterior electrical installations and interior discharge lighting operating at?
16.
What characteristics of supply be determined before an installation design can begin?
17.
Where a 3-core cable, with cores coloured brown, black and grey, is used as a switch wire for two-way or intermediate control. The terminations of the conductors shall be identified using?
18.
Every installation must be divided into circuits as necessary in order to
19.
Cables and equipment in circuits feeding motors shall be suitable for a current of at least?
20.
What should be made part of a PEI design to help combine information or data from or to the DNO, Electricity supplier and user?
21.
What does the 2nd letter T stand for in TT
22.
An RCD used for additional protection should operate, when tested at 1 times rated operating current, within
23.
In a location containing a bath or shower supplementary bonding may be omitted, amongst other conditions, where?
24.
20A final circuit is the wiring between?
25.
If there is a fault to earth on the HV side of a transformer, which types of overvoltage could affect the LV side ?
26.
In a sauna which one of the zones has no special requirements concerning the heat resistance of the equipment?
27.
Which of the following, is the symbol for a "class P" thermally protected independent lamp ballast permitted for mounting on a flammable surface?
28.
On caravan sites, overhead conductors in areas subject to vehicle movement shall be placed at a minimum height above ground of?
29.
Correct co-ordination between conductors and the circuit overcurrent protective device is achieved when:
30.
The minimum insulation resistance between conductors for an extra-low voltage circuit is?
By Neil