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Freezer-Extension Lead Exclusion-Guarantee.

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A customer of mine has said that the guarantee for his tall freezer is invalidated if the appliance is supplied through an extension lead.


Why is that?


How can an extension lead cause freezer damage? The appliance was running well supplied by an extension lead when I saw it.


Z
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    I've seen warnings like that on a lot of IT equipment - especially stuff of US origin.


    I don't know for certain the manufacturer's thinking but suspect that from a global perspective that extension leads often have less reliable earthing than fixed wall sockets (remember that most of the rest of the world has an option of plugs without an earth connection - usually with no physical constraint to stop 3-pin plugs being inserted into 2-pin trailing sockets; then there's the additional voltage drop and increased Zs (especially if the extension lead is thin and/or long) and generally the lower quality of extension leads (less reliable contacts etc.). If they were determined they could have specified a list of conditions under which an extension lead would be acceptable (c.s.a., length, presence of earth connections and so on) which your typical customer would probably think gobbledygook, or just make it simple (for themselves) and say don't.


    I agree though that a typical UK extension lead of modest length, reasonble c.s.a. and decentt quality is unlikely to cause any problems.


       - Andy.
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  • 0
    I've seen warnings like that on a lot of IT equipment - especially stuff of US origin.


    I don't know for certain the manufacturer's thinking but suspect that from a global perspective that extension leads often have less reliable earthing than fixed wall sockets (remember that most of the rest of the world has an option of plugs without an earth connection - usually with no physical constraint to stop 3-pin plugs being inserted into 2-pin trailing sockets; then there's the additional voltage drop and increased Zs (especially if the extension lead is thin and/or long) and generally the lower quality of extension leads (less reliable contacts etc.). If they were determined they could have specified a list of conditions under which an extension lead would be acceptable (c.s.a., length, presence of earth connections and so on) which your typical customer would probably think gobbledygook, or just make it simple (for themselves) and say don't.


    I agree though that a typical UK extension lead of modest length, reasonble c.s.a. and decentt quality is unlikely to cause any problems.


       - Andy.
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