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Topic Title: AFD's Required in rented properties (HMO's) ??...
Topic Summary: AFD's in HMO's ??
Created On: 06 February 2019 05:02 PM
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 06 February 2019 05:02 PM
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KJWhite

Posts: 6
Joined: 25 July 2008

Hi,
Looking at the requirements of the 18th Edition regarding AFD's (ARC Fault Devices), I'm trying to understand if these devices are required for HMO's ??
In this case, I have a customer with a 3-storey house. Rented through a University for Student accomodation.
Current Consumer Unit must be repaced, so I can add a supply for a new shower.
18th (421.1.7) shows "Premises with sleeping accomodation"
- I understand this to be 'Hostels' & the like, who provide overnight accomodattion?
But does it also mean "HMO's" ??
 06 February 2019 08:16 PM
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AJJewsbury

Posts: 17795
Joined: 13 August 2003

But does it also mean "HMO's"

I would say yes - but (and this is a big but) - it's only a recommendation, not a requirement.

When you see the current price of AFDDs over here (for some reason they see to be around ten times the price of the US equivalents) you might think it best to bide you time on this one.

- Andy.
 06 February 2019 08:25 PM
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mapj1

Posts: 12039
Joined: 22 July 2004

seconded. I think there will be a lot of folk looking the design, and after a short cost benefit analysis -" they cost too much and the benefit is small ", leaving them off for now. Maybe leave space in the CU so there is room later. Can one not split tails and have a mini-CU just for the shower?

-------------------------
regards Mike
 06 February 2019 08:37 PM
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KJWhite

Posts: 6
Joined: 25 July 2008

Hi,
Thanks for comments to date :-)
Yep - My current view that for 'Normal' domestic properties, it come down to Cost/Benefit. So currently, they are too expensive to add to EVERY circuit
- It the future I will possibly add them to 'Garage' circuits!
- And most likely to Farm Barns, Stables, etc...
Its just that in 'this' case, I am concerned about the 'Sleeping Accomodation' aspects!!
- But, since this HMO has full Fire Alarm system, I feel they will be ovorkill.
As for replacing Consumer Unit...
- I am pricing up FULL replacement, or, the option just to add a small 2nd CU :-)
- Problem is the current board is an old Wylex, where all MCB's are obsolete with NO posibility of replacing them!
Ta...
 06 February 2019 08:54 PM
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chrispearson

Posts: 1095
Joined: 15 February 2018

Originally posted by: KJWhite

- It the future I will possibly add them to 'Garage' circuits!


Well you wouldn't want a fault to immolate your R-R.

- And most likely Its just that in 'this' case, I am concerned about the 'Sleeping Accomodation' aspects!!

- But, since this HMO has full Fire Alarm system, I feel they will be overkill.


My inclination was that a risk assessment of an HMO must bear in mind not only a higher risk (type of resident and their number) but the consequences of the risk materializing (ditto) but the fire alarm reassures me.

By all means quote for an upgrade, but I don't think that you are entitled to press for one.
 06 February 2019 11:29 PM
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KJWhite

Posts: 6
Joined: 25 July 2008

True - I won't 'push' for a complete new CU - that's just greedy :-)
But I have given the customer the option.
Bearing in mind that Wylex do NOT support existing CU & cannot supply replacement MCB's
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