BMW Wallbox Instructions For Use Manual page 11

3.3 Choice of RCCB
The connection cable must be wired into the existing building installation and comply with the national
statutory regulations. For versions
61 90 5 A1E 1B1
61 90 5 A1E 1B4
the following considerations must be made:
Every BMW Wallbox must be connected using its own residual-current-operated circuit breaker
(RCCB). No other circuits may be connected to this RCCB.
RCCB at least type A (30 mA trip current).
Additional measures have been taken in the device to protect it from a direct current (DC) error
(> 6 mA DC).
These measures satisfy the requirements of IEC 62955. This means that there is no general
necessity to use a residual current device (RCD) type B, unless one is explicitly required by the
applicable installation regulations.
3.4 Choice of circuit breaker
When selecting the circuit breaker, you must also take into account the increased ambient
temperatures in the control cabinet. In certain circumstances, this may require the charging current
to be reduced to increase the system's availability. Set the rated current to suit the required charging
capacity, the available connecting rating and the details on the model plate.
An RCD type B (40 A min. and 400 V min.) must be used for the following versions:
61 90 5 A1E 1B1
61 90 5 A1E 1B2
61 90 5 A1E 1B4
An RCD type B (50 A min. and 250 V min.) must be used for the following versions:
61 90 5 A1E 1B3
61 90 5 A1E 1B5
3.5 Choice of connection cable
When selecting the connection cable, take into account the possible reduction factors and increased
ambient temperatures in the BMW Wallbox's internal connection zone, see temperature details for
the connection terminals. In certain circumstances, this may require the cable cross-section to be
increased and the temperature resistance of the connection cable to be adjusted.
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