Standards
What is AS/NZS3000:2007
Electrical installations
What PPE would be required when drilling cement based products?
Dust mask
Earmuffs
Safety glasses
Where is the neutral located in an Edison screw fitting?
Outer sheath
Ohms law
V
I R
What type of procedure would best minimise the danger of someone unintentionally energising a circuit?
Isolation and lockout
What is AS/NZS3017:2007
Verification guidelines (Testing)
What are plan specifications used for?
To give the reader extra information such as installation methods
MIMS element resistance
0.01MΩ
10,000Ω
A 1.5kw heater is used for 10 hours per day for 5 days. If the unit cost per Kwh is $0.35, the total cost of using this heater would be?
$26.25
1.5kwh X 10 hours X 5 days = 112.5
112.5 X 0.35 cost per unit = $26.25
An electric shock can occur when contact is made simultaneously by making contact with
Two objects at different voltages
What is AS/NZS3008
Electrical installations - Selection of cables
What device uses two coils to magnetically transfer energy from one coil via mutual induction?
Transformer
Series equation rules
Vt = V1 + V2
I is constant
Rt = R1 + R2
Pythagoras formulas
C2 = A2 + B2
A2 = C2 - B2
What is extra low voltage?
50v AC
120v Ripple free DC
What is AS/NZS5761:2011
In service inspection and testing - Second hand electrical equipment prior to sale
Which government agency is responsible for health and safety in the workplace?
Worksafe NZ
Parallel equation rules
V is constant
It = I1 + I2
Rt = (R1-1 +R2-1)-1
Power formulas
P = I X V
I = P/V
V = P/I
P = I2R
What is Low voltage?
Any voltage exceeding 50v AC or 120v ripple free DC, but not exceeding 1200v AC or 1500v ripple free DC
What is AS/NZS5762:2011
In-service safety inspection & testing - Repaired electrical equiptment
What best describes a break contact, and how do they operate?
Normally closed contacts that open when operated
RCD tripping times
Type 1 - 10mA 40ms
Type 2 - 30mA 300ms
What is the formula for volt drop in a series circuit?
Vt = Vd1 + Vd2 + Vd3
What is high voltage?
Voltage exceeding 1000v AC
or
1500v ripple free DC