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interpretation of SPD para in GN1 (18th)

psychicwarrior
"It should be noted that SPD's required by Section 443 of BS 7671 are to protect the electrical power installation, but exclude any electronic equipment, the protection of which is outside the scope of BS 7671."


what does that break down to mean ?


- that SPD's are for the (im interpretting 'electrical power installation' here to be...) fixed installation and any thing not permanently connected, is excluded ?

- that SPD's are for the fixed installation and any thing connected (permanently or otherwise) is included, *except* electronic equipment (which is pretty much every thing these days) ?

- that SPD's are for the fixed intallation and any thing connected is included, but what is the last bit re: electronic equipment about ?

- something else ?


Initially I went for the first of the above, but the definition of electrical equipment is clear enough, so what is that para getting at.


Hmmm

Habs
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    Whilst perhaps not well worded, telecomms and similar systems ('ICT systems') are specifically excluded from the scope of Section 443 of  BS 7671, as it is covered sufficiently well in other standards.


    See the paragraph (it's part of the Reg, not the Note) after Note 4 in 443.1.1, which says 'This section does not cover overvoltages transmitted by Information, Control and Telecommunications (ICT) systems. See BS EN 50174, BS EN 62305-4 and BS EN 61643-22.'


    ICT systems covers more than simply telephone and data though ... it includes security, controls/BMS etc.
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    Whilst perhaps not well worded, telecomms and similar systems ('ICT systems') are specifically excluded from the scope of Section 443 of  BS 7671, as it is covered sufficiently well in other standards.


    See the paragraph (it's part of the Reg, not the Note) after Note 4 in 443.1.1, which says 'This section does not cover overvoltages transmitted by Information, Control and Telecommunications (ICT) systems. See BS EN 50174, BS EN 62305-4 and BS EN 61643-22.'


    ICT systems covers more than simply telephone and data though ... it includes security, controls/BMS etc.
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