Ducatiboy stu
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In theory there is nothing wrong with switching the neutral if it is a double insulated device. Its when the device has an earthed chasis that it becomes a problem. Now before everyone gets their panties all twisted it is ILLEGAL - AS 1.7.12
AS 1.7.12 STATES " An isolation device shall interupt all active conductors but shall not operate in a neutral conductor, unless permitted by Clause 2.8.2, or an earthing conductor."
AS 2.8.2.2 STATES. " A switch or cct breaker shall not operate in a neutral conductor of -
A. An earth return system
B. Consumer mains.
C. A submain where the neutral is used for earthing of an electrical installation in an outbound building.
D. A submain or final subcircuit in which the neutral conductor is solidly earthed.
The requirements of D. Need not apply to-
i). A multipole switch which includes a contact intended for comnection in the neutral ; or
ii). A switch which is linked with correspinding switches so that the neutral contact cannot remain open when the active contacts are closed.; or
iii). Fire pump control
iv). A multipole switch which is installed for the purpose of conecting an alternate supply.
2.8.2.3 STATES. " Switches in earthing conductors is prohibited.
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AS 1.7.12 STATES " An isolation device shall interupt all active conductors but shall not operate in a neutral conductor, unless permitted by Clause 2.8.2, or an earthing conductor."
AS 2.8.2.2 STATES. " A switch or cct breaker shall not operate in a neutral conductor of -
A. An earth return system
B. Consumer mains.
C. A submain where the neutral is used for earthing of an electrical installation in an outbound building.
D. A submain or final subcircuit in which the neutral conductor is solidly earthed.
The requirements of D. Need not apply to-
i). A multipole switch which includes a contact intended for comnection in the neutral ; or
ii). A switch which is linked with correspinding switches so that the neutral contact cannot remain open when the active contacts are closed.; or
iii). Fire pump control
iv). A multipole switch which is installed for the purpose of conecting an alternate supply.
2.8.2.3 STATES. " Switches in earthing conductors is prohibited.
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