SPD - protection of main distribution board - T1+T2 - limp 12.5 kA/pole - 4P Legrand

"To provide correct protection, a lightning arrester is recommended:

- at the origin of each installation (mandatory depending on the type and location of the installation to be protected,

- at the origin of divisional switchboards: secondary protection or fine protection of sensitive equipment,

- on all outputs of external electrical circuits (supply to secondary buildings, external lighting or external electrical panels, etc.).

A communication network arrester should always be installed to protect communication equipment in the presence of a lightning arrester on the low-voltage network."