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    Classification of RCD - for Additional protection only or Fault protection?

    I would appreciate some opinions on the following situation... I have been asked to comment on an EICR for a local community resource (church hall used by various groups of all ages). During an EICR on the TN-C-S installation the testing of a ring final circuit gave R1+R2 and Zs(db) values that...
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    MEIWC Zdb is this Ze for the first/main DB/CU?

    Just looking at MEIWC (had not done so for quite a while). It asks for Zdb. When doing minor works on a larger installation a measured Zdb may be acceptable as turning off the whole installation is not possible/acceptable. However with a small installation with only one CU/DB is this really...
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    PAT test white goods?

    I have recently been asked about some PAT testing work undertaken in a local church hall. The PAT tester did not test the free standing under worktop fridges. The are connected via standard 13 Amp BS1363 plug and socket. The PAT tester said they do not test white goods. I cannot see any logic in...
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    Are installation methods 100, 101, 102 & 103 Reference methods?

    I am interested in opinions on the following. Looking at GN3, page 126 the example of a Generic Schedule of test results lists the reference method as 100. When I look at the OSG Table 7.1(ii) on page 74 it lists A, B, C, 100, 101, 102 & 103 as 'installation reference methods'. However when I...
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    PAT testing Fire Alarm control Panel?

    As (I believe) PAT testing includes fixed equipment connected to the electrical installation by an FCU (eg hand driers, built in ovens etc.) I have been trying to figure out if a Fire Alarm control Panel should be PAT tested and if so by who. Has this subject been addressed before? Does anyone...
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    BS7671 regulation 433.1.1

    In a quiet moment I am looking at something that has been in my mind for some time. Regulation 433.1.1 includes the phrase "The current (I2) causing effective operation of the protective device is given in the product standard or may be provided by the manufacturer" I assume that the product...
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    Temperature correction of Zs, Ze and R1 + R2

    I am looking at a scenario of temperature compensation in a text book (Practical Guide to Inspection, Testing and Certification of Electrical Installations, 5th Ed. by Christopher Kitcher). In the example (Scenario 2, pp 128-129) the measured value of R1 + R2 is adjusted for temperature effects...
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    Hello

    Hello, been meaning to post on the welcome forum since I registered several weeks ago. Looking forward to asking a few things about which I have been thinking.

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