Hi all,

BS 61439-1 scope states that 

This document applies to assemblies only when required by the relevant assembly standard as follows: – assemblies for which the rated voltage does not exceed 1 000 V AC or 1 500 V DC; – assemblies designed for a nominal frequency of the incoming supply or supplies not exceeding 1 000 Hz; – assemblies intended for indoor and outdoor applications; – stationary or movable assemblies with or without an enclosure; – assemblies intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electrical energy consuming equipment."

The definition of a low-voltage switchgear and controlgear assembly assembly is given in section 3.1.1 as "combination of one or more low-voltage switching devices together with associated control, measuring, signalling, protective, regulating equipment, with all the internal electrical and mechanical interconnections and structural parts, as defined by the original manufacturer, which can be assembled in accordance with the original manufacturer’s instructions" 

Note 2 states "The term “switching device” includes mechanical switching devices and semiconductor switching devices, e.g. soft starters, semiconductor relays, frequency converters. The auxiliary circuits may also include electro-mechanical devices, e.g. control relays, terminal blocks, and electronic devices, e.g. electronic motor control devices, electronic measurement and protection devices, bus communication, programmable logic controller systems. "

So, my question is, to what extent does this apply? If a contractor purchases an empty terminal box, installs a terminal role and then some terminal box for a through connection should this then be verified to this standard?

The auxiliary circuits does phrase seems to come out of nowhere with no clear point? If the terminal box assembled by a contractor does not fall under this scope then what governs this?

Thanks all