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May 21
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› Venting for cooker hood / earthing ...
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Venting for cooker hood / earthing ... (Read 2934 times)
Lee_Elms
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Venting for cooker hood / earthing ...
Apr 4
th
, 2005, 2:46pm
I plan to install venting from an existing cooker hood using flexible aluminum ducting (4" diameter).
Does this need 'earthing' in any way ?
If so, is this in terms of connecting it electrically to the earthed body of the cooker hood, or directly to the earth in the CU. How do you make the connections to the aluminum duct sections ?
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th
, 2005, 2:48pm by Lee_Elms
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LSpark
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Re: Venting for cooker hood / earthing ...
Reply #1 -
Apr 4
th
, 2005, 4:50pm
Hi Lee
In you're situation it's not normal to be able to earth or bond flexible pipes or ducting, I would reccomend bonding/earthing you're hood, if it isnt already, to the earth terminal in the cooker connection
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Re: Venting for cooker hood / earthing ...
Reply #2 -
Apr 4
th
, 2005, 5:56pm
The hood is an electrical appliance - it is made as a single item (ducting excepted) with lights and/or fan, and an electrical connection.
If it has an earth connection, it will be earthed automatically and appropriately when it is plugged/wired in.
If it does not, then surely by "bonding" the hood to the earth terminal of the cooker you are earthing the casing of a Class II appliance - something not recommended?
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Re: Venting for cooker hood / earthing ...
Reply #3 -
Apr 4
th
, 2005, 6:04pm
Yep, it's probably all one unit, and if so it's best the earthing of the ducting is left well alone
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th
, 2005, 6:04pm by LSpark
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Lee_Elms
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Re: Venting for cooker hood / earthing ...
Reply #4 -
Apr 4
th
, 2005, 6:34pm
Thanks for the replies.
I suppose what I was thinking of was the general thing of earth bonding metallic items such as gas and water piping ... is there something which distinguishes this from the vent ducting ? (I think the cooker hood itself is a bit of a red herring).
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Lee_Elms
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Re: Venting for cooker hood / earthing ...
Reply #5 -
Apr 4
th
, 2005, 6:37pm
To clarify, in case it's relevant: the ducting is joined to the hood via a plastic connection piece, so there isn't an electrical connection here.
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