Test And Spec Flashcards
(51 cards)
What will the inspector issue when a new circuit is added to an existing installation
An initial verification certificate
What’s the correct document to be completed when additional socket has been added to an A1 ring circuit?
Minor electrical installation works certificate
What’s the unit of measure for an insulation test
M omhs
Unit of measure for a PFC instrument
kA
What’s the maximum test current applied to a 30mA RCD
5x30=150mA
One item of information that isn’t included on a minor works cert.
External loop impedance (Ze)
How do you calculate the ipscc?
IPFC= V/ZE
What’s required to do before an insulation resistance test?
Remove all loads from the circuit
What instrument is used to carry out continuity of prospective conductors tests?
A low ohms meter
On a socket ring when you cross the cpc’s and line conductors what will you be testing?
R1+R2 values
What will the mains intake current be recorded as?
Prospective fault current
How do u calculate the expected value of R1+R2 for a ring circuit
Line+cpc/4
Supplementary bonding conductors that are not protected from mechanical damage shall have a cpc no smaller than?
4 sqmm
What’s the maximum test current that will be applied to a 100mA RCD
100mA
If you double the amount of circuits
What will happen to the insulation resistance
Decrease
Supplementary bonding conductors that are protected against mechanical damage shall have a csa of
2.5sqmm
What type of instrument will measure leakage current in a circuit
Clamp meter
When a certificate is issued for initial verification for the certificate to be valid what must it be accompanied by
Test results sheet
Nest Inspection dates for domestic
10 years max (recommendation)
Next inspection dates for flats/hotels/student residents
5 years max (law)
Next inspection dates for commercial/ shops
5 years max (law)
Next inspection dates for industrial
3 years max (law)
Next inspection dates for building sites
3 months (law)
Are the schedule of test results and the circuit schedule be kept together as one document?
NO