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Selection of a Type 2 SPD

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General rules of electrical installation design
Connection to the MV utility distribution network
Connection to the LV utility distribution network
MV and LV architecture selection guide for buildings
LV Distribution
Protection against electric shocks and electric fires
Sizing and protection of conductors
LV switchgear: functions and selection
Overvoltage protection
Energy Efficiency in electrical distribution
Power Factor Correction
Power harmonics management
Characteristics of particular sources and loads
PhotoVoltaic (PV) installation
Residential and other special locations
ElectroMagnetic Compatibility (EMC)

Maximum discharge current Imax

The maximum discharge current Imax is defined according to the estimated exposure level relative to the building's location.

The value of the maximum discharge current (Imax) is determined by a risk analysis (see table in Figure J32).

Exposure level
Low Medium High
Building environment Building located in an urban or suburban area of grouped housing Building located in a plain Building where there is a specific risk: pylon, tree, mountainous region, wet area or pond, etc.
Recommended Imax value (kÂ) 20 40 65

Fig. J32Recommended maximum discharge current Imax according to the exposure level