| 5.2.2.14. | Where the auxiliary equipment is supplied with energy from the service braking system, the service braking system shall be protected to ensure that the sum of the braking forces exerted at the periphery of the wheels shall be at least 80 per cent of the value prescribed for the relevant trailer as defined in paragraph 3.1.2.1. of Annex 4 to this Regulation. This requirement shall be fulfilled under both of the following operating conditions: | a0c0 |