Hi Everyone,
I would like to confirm a question I saw the other day regarding working out the residual current on an RCD
The question was similar to the following
An earth electrode has been measured and the following readings were taken
1) 21 Ohms
2) 21.02 Ohms
3) 20.8 Ohms
What is the maximum residual current RCD that can be used on the circuit above.
I assume the test was obtained by test method E1 using a dedicated earth electrode.
reference to 411.5.3 (ii) Ra x I<50 V (apologies not sure how to get the correct symbols. lol would have thought it would be simple like inserting a smiley face )
I worked it out to 2000mA but not sure if it was the right choice, as it's not widely used especially in domestic installations.
other choices were from Table 41.5 in the regs.
what are your thoughts?
I would like to confirm a question I saw the other day regarding working out the residual current on an RCD
The question was similar to the following
An earth electrode has been measured and the following readings were taken
1) 21 Ohms
2) 21.02 Ohms
3) 20.8 Ohms
What is the maximum residual current RCD that can be used on the circuit above.
I assume the test was obtained by test method E1 using a dedicated earth electrode.
reference to 411.5.3 (ii) Ra x I<50 V (apologies not sure how to get the correct symbols. lol would have thought it would be simple like inserting a smiley face )
I worked it out to 2000mA but not sure if it was the right choice, as it's not widely used especially in domestic installations.
other choices were from Table 41.5 in the regs.
what are your thoughts?