A designer adds a 7 kW charge point to a house and takes a cooker-style diversity allowance off it. Nothing on site limits the charging. What is wrong?

Section 722 gives no diversity figure for EV charging

Nothing, provided the cable is sized to the full 32 A

Diversity is fine, but only when charging is overnight

Diversity applies only to three-phase charge points

At the survey you find the DNO’s cut-out cracked and scorched. The maximum demand with the charge point added is well within limits. What do you do?

Contact the DNO about the cut-out before you install

Fit the charge point and record the cut-out on the EIC

Open the cut-out to check the fuse, then go ahead

Fit it and include the cut-out in the 28-day notice

Free mock exam

Design considerations — EV Charging Installation Practice

Free topic-focused mock exam: 25 random questions from a pool of 35 on Design considerations, drawn from the wider EV Charging Installation bank. 50-minute timer, 60% to pass, worked explanation on every question. Use this when you've taken the full mock once and want to drill the topics you got wrong.

Questions: 25
Time limit: 50 min
Pass mark: 60% · 15/25
Question bank: 35

Free, no sign-up. Retake as many times as you like — different questions each time.

Sample questions

01A designer adds a 7 kW charge point to a house and takes a cooker-style diversity allowance off it. Nothing on site limits the charging. What is wrong?
- ADiversity is fine, but only when charging is overnight
- BDiversity applies only to three-phase charge points
- CSection 722 gives no diversity figure for EV charging
- DNothing, provided the cable is sized to the full 32 A
Why: A car can sit at full rated current for hours, and Section 722 gives no diversity allowance for it. The only reduction 722.311 recognises is load curtailment under 722.311.201, which needs something that actually reduces or disconnects the load. Overnight charging is tempting, but the point still runs at full current. Single or three-phase makes no difference.
02At the survey you find the DNO’s cut-out cracked and scorched. The maximum demand with the charge point added is well within limits. What do you do?
- AFit it and include the cut-out in the 28-day notice
- BFit the charge point and record the cut-out on the EIC
- COpen the cut-out to check the fuse, then go ahead
- DContact the DNO about the cut-out before you install
Why: The ENA form says the DNO must be contacted before installation where there is a safety concern with the existing DNO service equipment, and 132.16 says no addition may be made unless the rating and condition of existing equipment, including the distributor’s, is adequate. The 28-day notice comes after connection, and you must not open the cut-out unless authorised.
03You are adding a charge point circuit to an existing house. Which regulation makes you check the existing earthing and bonding are adequate for it?
- ARegulation 722.312.2.1
- BRegulation 536.4.202
- CRegulation 722.533.101
- DRegulation 132.16
Why: 132.16 says no addition or alteration may be made unless the rating and condition of existing equipment, including the distributor’s, is adequate, and that the earthing and bonding arrangements needed for the protective measure must be adequate. 722.533.101 is about each point having its own final circuit, 536.4.202 about assembly ratings, and 722.312.2.1 bans a PEN in the circuit.

Common questions

Is the Design considerations mock exam free?

Yes, it is free with no sign-up needed. Questions are pulled at random from a substantial bank, with a worked explanation on every question after you submit.

Can I retake the mock exam?

Yes. Every attempt picks a different random selection and reshuffles the options, so each retake gives you genuinely new questions. No limit on retakes.

Does this count as a qualification?

No. This is independent practice material and does not award a qualification, card or certificate. Where a subject has a formal qualification or card, you gain it through an approved provider.