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» I.T. system - medical locations
regulation 537.1.4  EmptySun Dec 02, 2012 9:00 am by Andy B

» regulation 537.1.4
regulation 537.1.4  EmptyFri Sep 07, 2012 3:59 am by iant

» Flashing LED Lamps on Two Way Switched Circuits
regulation 537.1.4  EmptyThu Aug 23, 2012 8:26 am by terry gray

» The Long Lead (R2) Continuity Test for Periodic Inspections
regulation 537.1.4  EmptyWed Aug 22, 2012 5:31 pm by terry gray

» The Importance of Providing Layout Diagrams and Labelling
regulation 537.1.4  EmptyTue Aug 21, 2012 5:22 pm by terry gray

» Shocking experience whats the explanation?
regulation 537.1.4  EmptyTue Aug 21, 2012 8:51 am by Dunc

» Use of a Voltage Detector as a Means of Quickly Finding Unearthed Metalwork
regulation 537.1.4  EmptyTue Aug 21, 2012 6:25 am by terry gray

» Certificates
regulation 537.1.4  EmptyMon Aug 20, 2012 5:33 pm by terry gray

» Use of an A.C. Milli-Amp Clampmeter for Fault Finding Purposes
regulation 537.1.4  EmptyWed Aug 15, 2012 8:39 am by terry gray

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regulation 537.1.4

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regulation 537.1.4  Empty regulation 537.1.4

Post by iant Fri Sep 07, 2012 3:59 am

Hi all,

An old chesnut for comments, I remember when I was on the other side of the fence having an Assessment by Keith Scott (AE11 1990's) and he commented that the installation did not have A main switch on the installation (two D/B's with individual isolators was the senario from what I remember) and we got into a discussion and Keith stated that every installation shall have A main switch, I replied that would mean that most on/off peak domestic installation would fall foul of that regulation, his reply was install a four pole isolator, as you can imagine that idea never got put into practice by myself. I have since been asked about the correct meaning of this by numerous contractors both my own A\C's and on tech help. My view has been as long as each DB has an isolator capable of isolating from the supply, and where required a warning label informing to isolate at more than one pont and if there is a bus-bar chamber, this must have a isolator before it. In this case I would consider the installation to start from the protective device enclosure i.e. the DB, what do others think and how do you interpret for assessment, bearing in mind the PV installations in domestic are now having "Garage" boards installed so we might now have numerous DB's in an installation.

any thoughts

Ian

iant

Posts : 1
Join date : 2012-02-29

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