brucelee
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Hi tom
this thread is for information only i believe and your questions would be better posted in the section for inspection and testing were they will be answered more quickly
In regard to your question regarding 100mA RCDs
100mA RCDs are not used for additional protection so when testing
test at 1/2 I delta n (50mA) on both half cyles of the waveform the device should not trip then
test at 1 x i delta n (100mA) on bth half cycles device should trip in 300ms if BSEN 61008 record the highest reading
do not test at 5x as the device is not used for additional protection neither is a 300mA or 500mA
so you answer would have Been (a) there is loads of this info in this thread and others on the forum use the search bar at the top
where an RCD with a rated residual operatng current I delta n not exceeding 30mA is used to provide additional protection (against direct contact) with a test current of 5 x I delta n the device should open in less than 40ms
where loop impedence values cannot be met RCDs of an appropriate rating can be installed there rating can be determined from
I delta n = 50/Zs
I delta n is the rated operating current of the device
50 is the touch voltage and Zs the measured earth fault loop impedence
the accepted lethal level of sock current is 50mA and hence RCDs rated at 30mA or less would be appropraiteforuse where shock is increased risk
30mA are used for
. All socket outlets rated at no more than 20A and for unsupervised general use
. Mobile equpment rated at not more than 32A for use outdoors
. all circuits in a bath /shower room
. Preferred for al circuits in a TT installation
. All cables installed less than 50mm from surface of a wall or partiition (in safe zones) if the instalation is unsupervised , and also at any depth if the construction of the wall or partition includes metallic parts
. in zones 0, 1 and 2 of swimming pool locations
. All circuits in a location containing saunas
. socket outlet final circuits not exceeding 32A in agricultural locations
. circuits supplying class 11 equipment in restrictive conductive locations
. each socket outlet in caravan parks and marinas and final circuits for houseboats
. al socket outlets rated at no more than 32A for show stands etc
. All socket outlet circuits rated at no more than 32A for construction sites ( where reduced low voltage is not used )
. All socket outlets supplying equipment outside mobile or transportable units
. All circuits in caravans
. All circuits in circuses
. A circuit supplying class II heating equipment for floor and ceiling heating systems
this thread is for information only i believe and your questions would be better posted in the section for inspection and testing were they will be answered more quickly
In regard to your question regarding 100mA RCDs
100mA RCDs are not used for additional protection so when testing
test at 1/2 I delta n (50mA) on both half cyles of the waveform the device should not trip then
test at 1 x i delta n (100mA) on bth half cycles device should trip in 300ms if BSEN 61008 record the highest reading
do not test at 5x as the device is not used for additional protection neither is a 300mA or 500mA
so you answer would have Been (a) there is loads of this info in this thread and others on the forum use the search bar at the top
where an RCD with a rated residual operatng current I delta n not exceeding 30mA is used to provide additional protection (against direct contact) with a test current of 5 x I delta n the device should open in less than 40ms
where loop impedence values cannot be met RCDs of an appropriate rating can be installed there rating can be determined from
I delta n = 50/Zs
I delta n is the rated operating current of the device
50 is the touch voltage and Zs the measured earth fault loop impedence
the accepted lethal level of sock current is 50mA and hence RCDs rated at 30mA or less would be appropraiteforuse where shock is increased risk
30mA are used for
. All socket outlets rated at no more than 20A and for unsupervised general use
. Mobile equpment rated at not more than 32A for use outdoors
. all circuits in a bath /shower room
. Preferred for al circuits in a TT installation
. All cables installed less than 50mm from surface of a wall or partiition (in safe zones) if the instalation is unsupervised , and also at any depth if the construction of the wall or partition includes metallic parts
. in zones 0, 1 and 2 of swimming pool locations
. All circuits in a location containing saunas
. socket outlet final circuits not exceeding 32A in agricultural locations
. circuits supplying class 11 equipment in restrictive conductive locations
. each socket outlet in caravan parks and marinas and final circuits for houseboats
. al socket outlets rated at no more than 32A for show stands etc
. All socket outlet circuits rated at no more than 32A for construction sites ( where reduced low voltage is not used )
. All socket outlets supplying equipment outside mobile or transportable units
. All circuits in caravans
. All circuits in circuses
. A circuit supplying class II heating equipment for floor and ceiling heating systems
ECLARATION . 
