EV (Electric Vehicle) charging requirements

What is meant by the term DNO
1. Distribution Network Operator
2. Designated Network Operator
3. Distribution Network Operations
4. Designated Network Operations
At what value of maximum demand for the installation are you required to inform the DNO before installing a new EV charging point
1. 30 amps
2. 40 amps
3. 50 amps
4. 60 amps or above
If the supply cable feeding the installation is a 'looped supply', you need to
1. Inform the DNO within 28 days after installation of the new EV charging point
2. Inform the customer that they have a looped supply cable installed
3. Not install the new EV charging point and contact the DNO
4. Ask the customer to contact the DNO after the new EV charging point has been installed
If the value of the maximum demand for the installation is below 60 amps, after installing a new EV charging point you need to contact the DNO and inform them within
1. 7 days
2. 14 days
3. 28 days
4. 6-months
The PME notice on an installation supply cut-out would indicate that the earth arrangement is
1. TN-C-S
2. TN-S
3. TT
4. TN-C
What is meant by the abbreviation ENA
1. Energy Network Association
2. Energy Notification Authority
3. EV Network Association
4. EV Notification Authority
When installing a new EV charging point, avoid protecting the EV charging circuit with a
1. type ‘B’ RCBO
2. type ‘A’ RCBO
3. type ‘AC’ RCD
4. MCB
The circuit supplying a new EV charging point does not require 30mA RCD protection if it is
1. Surface clipped PVC flat profile cable
2. Surface clipped PVC flat profile cable chased into a wall at a depth of less than 25mm
3. PVC flat profile cable chased into a wall at a depth of less than 35mm
4. PVC flat profile cable chased into a wall at a depth of less than 40mm
An EV application form for the ENA requires electrical installation details about the
1. Installation address, number of phases, maximum demands and the age of the EV to be used
2. Earthing arrangement, supply voltage, the manufacturer of the EV charging point and the installation address
3. Supply voltage, maximum demand, earthing arrangement and installation address
4. Age of the EV to be used, the manufacturer of the EV charging point, the installation address and the supply voltage
When installing a new dedicated circuit for an EV charging point best practice requires
1. The circuit is protected by an AC-type RCD
2. A separate consumer unit is installed for the new EV charging point
3. The cable run is 5m or less for the new EV charging point
4. The new EV charging point is installed at least 2m above finished floor level.
To monitor the incoming supply current, which conductor do you connect the current transformer to
1. The line conductor in the cable that feeds the new EV charging point
2. The neutral conductor in the cable that feeds the new EV charging point
3. The neutral conductor of the meter tail feeding the installations' consumer unit feeding the property
4. The line conductor of the meter tail on the consumer’s side of the kWh meter.
When connecting a current transformer to a conductor, it’s important that the arrow on the current transformer points
1. Upwards
2. Downwards
3. Into the installation away from the kWh meter
4. Outwards from the installation and away from the kWh meter
The largest rating of the cut-out fuse for a single phase domestic dwelling is
1. 100A
2. 80A
3. 60A
4. 30A
Which one of the following earthing arrangements is NOT a commonly used for a domestic dwelling in the U.K.
1. TN-C
2. PME
3. TT
4. TN-S
If the cable supplying a new EV charging point requires RCD protection at 30mA or less, the installer should take into consideration the
1. Selectivity
2. Maximum demand
3. Diversity
4. The IP rating of the charging point
When installing a new dedicated circuit for an EV charging point, best practice requires
1. The circuit is to be protected by an ‘AC’ type RCD
2. An earth electrode resistance of 200 ohms is installed at the origin of the installation
3. A separate dedicated consumer unit is installed to supply the new EV charging point
4. The new EV charging point is fitted 2m from finished floor level.
Safe isolation of the supply must be carried out with an approved voltage indicating device that conforms to
1. BS7671
2. DS38
3. GS38
4. IP44
Why might a newly installed EV charging point cause an issue to an existing electrical installation
1. It's a large load connected for a short period of time
2. It's a large load connected for a long period of time
3. It's a small load connected for a long period of time
4. It's a small load connected for a short amount of time
Which of the following would NOT be a reason to contact the DNO regarding an electrical supply service head
1. Evidence of overheating
2. Damaged enclosure
3. Evidence of tampering
4. Service head securely fixed
When connecting a new EV charge point to a public network supply and it is suspected that the supply is not metered, what action needs to be taken
1. No action
2. Connect the charge point anyway
3. Contact the network operator and request a new connection
4. Contact the Local Authority (Council)
If the EV charging point is being connected to a landlord's electrical supply, what action is recommended
1. Contact the Local Authority (Council)
2. Confirm that the landlord has given permission for the charging point connection
3. Connect the charger up without making any enquiries
4. No special action is required
If the landlord refuses permission for the connection of a new EV charger point to their supply, what action should be taken
1. Suggest that the client considers legal action
2. Explain to the customer that the charger point cannot be installed
3. Connect the charger point to the supply anyway
4. Advise the client to contact the DNO to arrange a new supply
In which of the following publications will you not find methods for calculating maximum demand for an electrical installation
1. BS7671 Guidance Note 1: Selection and Erection
2. Code of Practice: Electric Vehicle Charging Equipment Installation
3. Electrical Design Guide
4. BS7671 On-Site Guide
Which Appendix of BS7671: Guidance Note 1 (Selection and Erection) contains information on calculating maximum demand for an installation
1. Appendix I
2. Appendix F
3. Appendix H
4. Appendix G
Which of the following is true regarding maximum demand from the appropriate appendix in BS7671: Guidance Note 1
1. It will give you the exact value of maximum demand
2. It is the only method you can use to calculate maximum demand
3. It is one acceptable method of calculating maximum demand
4. It will be appropriate for every type of installation
To find the current demand used by a load, which of the following basic formulas is correct
1. I=VR
2. I=P/V
3. I=V/P
4. I=PV
In previous BS7671: On Site guidance, the recommended value to assume for a general lighting service lampholder when determining maximum demand for an installation was
1. 65W
2. 30W
3. 100W
4. 150W
According to the Electrical Design Guide, the recommended value to assume for a general lighting service lampholder is
1. 65W
2. 30W
3. 100W
4. 150W
According to guidance, small loads such as electric clocks, shaver outlets etc can be ignored for the purposes of maximum demand if their rating is below
1. 3A
2. 230v
3. 5W
4. 5VA
The principle that not all electrical loads will be operating at the same time is known as
1. Discrimination
2. Selectivity
3. Coordination
4. Diversity
How much current should be added to the maximum demand calculations to make allowance for a 13A socket outlet on a cooker control unit
1. 6A
2. 13A
3. 5A
4. 10A
What percentage of the total lighting load will be taken into account for maximum demand for a residential property
1. 50%
2. 66%
3. 75%
4. 90%
If the maximum demand of an installation is greater then 60A when including a new EV charge point, which of the following applies
1. Approval from the DNO must be granted prior to the installation of the EV charge point
2. Installation of the EV charge point can go ahead and the DNO notified within 28 days
3. The installation of the EV charge point can be completed with no notification required
4. An upgrade to the supply should be requested from the DNO
Which part of regulation 722.411.4.1 applies for an EV charge point which electrically disconnects the electric vehicle from the live conductors and Earth if the voltage exceeds 253v or is less than 207v
1. (v)
2. (ii)
3. (iii)
4. (iv)
Before siting an EV charge point, Codes of Practice: Electric Vehicle Charging Equipment Installation recommends a survey to determine
1. Internet network connectivity
2. External influences
3. Risk of tampering
4. Structural integrity
Which of the following best describes the Code of Practice's recommendation for RCD protection for EV charge points
1. A stand alone RCD must always be provided
2. A stand alone RCD must never be used
3. Two RCDs in series should be provided
4. Manufacturer's instructions should be followed regarding RCD selection
Which section of BS 7671 details Electric Vehicle Charging Installations
1. Section 721
2. Section 722
3. Section 729
4. Section 730
Which of the following is the mode of charging where connection to the EV is via standardized socket outlets not exceeding 32A and 250v AC
1. mode 1
2. mode 2
3. mode 3
4. mode 4
The term used by BS 7671 to describe limiting the amount of current drawn into an installation is
1. Load curtailment
2. Load current
3. Limited current
4. Limiting curtailment
According to BS 7671, load shedding can be taken into account when considering which of the following
1. Diversity
2. Selectivity
3. Maximum Demand
4. Segregation
Placing the current transformer around an incoming Line conductor can help to
1. Control of all loads in the installation
2. Ensure the EV charge point won't overload the supply
3. Balance the current demand of the installation
4. Reduce the supply voltage to a safer level
If using a current transformer to limit the load current, what control criteria must be met
1. Hard wired and cloud managed
2. Wireless operation and cloud managed
3. Wireless operation and locally managed
4. Hard wired and locally managed
Which of the following is a correct statement in relation to charging an electric vehicle in an outside\outdoor environment
1. A PME earthing facility can be used as the sole means of earthing without any special precautions
2. A PME earthing facility must never be used as the means of earthing
3. A PME earthing facility can be used the means of earthing as long as certain other precautions are also in place
4. A PME earthing facility must be used as the main means of earthing without any special precautions
What does the abbreviation PME mean
1. Preventative Multiple Earthing
2. Protected Monitored Earthing
3. Protective Multiple Electrodes
4. Protective Multiple Earthing
What is the generally accepted minimum level of mains current that is harmful to a person
1. 30mA
2. 50mA
3. 70mA
4. 100mA
What is the voltage between CPC and Earth that the EV regulations require a device to disconnect a charging electric vehicle from the supply
1. 25V
2. 30V
3. 50V
4. 70V
According to part (iv) of regulation 722.411.4.1, what is the maximum voltage permitted between line and neutral before the protective device has to operate
1. 207V
2. 230V
3. 240V
4. 253V
According to part (iv) of regulation 722.411.4.1, what is the minimum voltage permitted between line and neutral before the protective device has to operate
1. 207V
2. 230V
3. 240V
4. 253V
If no RDC-DD is used in an EV charge point installation circuit, what type of RCD protection must be provided
1. Type B
2. Type A
3. Type F
4. Type AC
If an RDC-DD is used in an EV charge point installation circuit, what type of RCD protection can be used
1. Type AC or Type B
2. Type AC or Type F
3. Type AC or Type A
4. Type A or Type F
What does the abbreviation RDC-DD stand for
1. Residual direct current detection device
2. Remaining direct current detection device
3. Residual direct current detection delay
4. Remaining direct current delay detection
At what value of current must the RDC-DD disconnect the EV charge point from the mains supply
1. 6mA
2. 10mA
3. 100mA
4. 40mA
Which one of the following conditions applies when separate RDC-DD and RCD protection is used for an EV charge point circuit
1. The RDC-DD and the RCD must both be installed in the charging unit
2. The RDC-DD may be installed in the charging equipment and the RCD upstream
3. The RDC-DD must be installed in the charging unit and the RCD in the consumer unit
4. The RDC-DD and the RCD must both be in the consumer unit
What is the minimum IP rating for EV charging equipment installed outdoors, to protect against the presence of water and solid objects
1. IP44
2. IP64
3. IP65
4. IP54
With reference to BS 7671, what is the minimum impact rating required for EV charging equipment installed in car parks and other public areas
1. IK10
2. IK07
3. IK09
4. IK08
With reference to BS7671, which one of the following is the mode of charging where connection to the EV is via dedicated electric supply equipment where the control pilot function extends to control equipment in the EV supply equipment
1. mode 1
2. mode 2
3. mode 3
4. mode 4
What percentage of the total lighting load will be taken into account for maximum demand for a small hotel
1. 50%
2. 75%
3. 66%
4. 90%
Which part of regulation 722.411.4.1 applies for an EV charge point which electrically disconnects the electric vehicle from the live conductors and Earth if the voltage between the c.p.c and Earth exceeds 70v due to an open circuit in the PEN conductor
1. (v)
2. (iii)
3. (ii)
4. (iv)

EV (Electric Vehicle) charging requirements

EV (Electric Vehicle) charging installation requirements - 15 questions from a large question bank (reference can be made to BS7671 regulations book, On-Site guide, Electrical Design Guide and Code of Practice: Vehicle Charging Equipment Installation publications when completing this exercise).