SRG1VCU-RM is a single phase type 2 surge
arrester assembly, for use on TN-C-S (PME) /
TN-S / & TT networks.

It is designed for retro-fitting application, to provide protection
of electrical appliances against impulse surges, where it is
not possible to accommodate a suitable surge arrester
directly within the existing consumer unit.

This product can be installed at the origin of a
residential installation, only where there is little or
no risk from direct lightning strike
(as determined by the risk assessment calculation
within BS7671:2018 443.5).

It is primarily suited to installations located in an urban area,
without an external lightning protection system,
and fed from an underground power source.

It is not suitable for buildings fed directly from
overhead power lines.