First Assessment Flashcards
What is the name of the earthing system that combines earth and neutral and then separates at the consumers intake?
TN-C-S
Where a three phase supply is provided for commercial or industrial properties, what is the voltage most likely to be?
400V
What is an exposed conductive part?
Trunking
What does the abbreviation ADS stand for?
Automatic Disconnection of Supply
Which of the following indicates how a circuit operates?
Circuit diagram
What would you use to determine how a piece of equipment works
User Guide
You need to install cable in a high temperature environment, MICC is specified, however the customer asks for a cheaper alternative. what would this be?
FP
For a new build domestic property, what would the main service fuse be rated at
100A
The term strapper cable is associated with?
Two way lighting
If cables are buried in a wall to more than 50mm in depth what further action should be taken?
None
When a TNS earthing system is used what element would carry a fault current
Metal Sheath
A domestic heater is rated at 4.5kW what would be the design current?
4.5kW = 4500W
4500 Divided by 230V = 19.56A
The cable that goes from the L1 side of a one way switch to your light fitting is known as:
Switch wire
What are the old Line conductor colors?
Red, Yellow, Blue
What is material is the compressed insulation in an MICC cable?
Magnesium Oxide
Using the singles method the switch feed from the DB goes to what terminal?
Common of the switch
Name the two types of fire alarm systems
Addressable & Conventional
The abbreviation 3L1.5 when using MICC would refer to
3 core light duty 1.5mm
Main protective bonding on an incoming water supply should be positioned at:
600mm from the intake position
Zs is = to
Ze +(R1+R2)
Failure to refer to the Wiring Regulations could result in which of the following:
Non-compliance with regard to the building regulations
+
non-compliance with regard to health & Safety
Which of the following is regarded as non-statutory
BS 7671
Which of the following came about through an act of parliament?
Health & Safety Act 1974
A double socket outlet is shown with a scale dimension of 15 mm. Using a scale of 1:100, calculate the actual dimension of the socket.
15mm x 100 = 1500mm / 1.5m
Which of the following indicates how a circuit operates
Circuit diagram
Which of the following would be beneficial in order to determine how a piece of equipment works?
User Guide
Which of the following would you refer to if you were installing unfamiliar equipment
Manufacturers instructions
Familiarizing yourself with which document means that you are following a code of practice?
BS 7671
An appropriate wiring method for a domestic installation would be:
PVC/SWA cables
An appropriate wiring method for a domestic installation would be:
PVC flat profile cable