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Posted By Topic: Commercial RCDs

Monteray
Mar 05 2019 19:03

Commercial installation, multiple RCD's at multiple switchboards.
How often should these be tested, how should they be tested & determined by whom?
I have had a look at 3019 & 3017, 3019 says to be guided by 3017 but they both say to use test button or test equipment.
3019 says 2.8.1 Note 1, period may be set by legislation & Note 2, period may be four years.
Could someone please confirm whether the period & method would be up to the commercial operator & their HS policies or by legislation? Which legislation?
If determined by the operator which standard or legislation would be best for them to take guidance from?
   

DougP
Mar 05 2019 19:50

Have you looked in 3760?
   

Monteray
Mar 05 2019 22:14

Have now, Thanks DougP.
   

AlecK
Mar 06 2019 08:28

While the trip time test gives "added value"; the most important bit is just making the RCD operate.
Being a fundamentally mechanical device (albeit with electric / electronic trigger circuit), and having very sensitive working parts; they can seize up over time through lack of use.

Regular testing, even if only by push-button, avoids this problem.
Would be appropriate to encourage customers to "press the buttons" every time daylight saving time arrives.