EN 1648-1-2017 pdf download.Leisure accommodation vehicles – 12 V direct current extra low voltage electrical installations – Part 1: Caravans.
Cables may be run either visibly or concealed. Cables shall be protected by suitable means against mechanical damage, thermal overload and chemical reaction.
Cables of ELV circuits and cables of other circuits (e.g. cables for LV current) may be run together, if the insulation of the cables or the individual circuits are designed for the highest value of voltage which is likely to be present.
5.3.4 Supporting of cables
Cables shall be supported at maximum intervals of 400 mm for vertical runs. Horizontal runs, unless run in conduits or ducts, shall be secured at maximum intervals of 250 mm. In the case of horizontal runs of a cable on a fiXed substructure, cables shall be supported at maximum intervals of 400 mm.
5.3.5 Connections
All cable connections shall be accessible; connectors shall be protected against unintentional contact
Connections of external cables shall be enclosed to provide ingress protection of not less than IP 44 according to EN 60529.
5.3.6 AuxIliary battery cables
Cables from an auxiliary battery shall be protected by additional sheathing or taping with a minimum thickness of 0,2 mm up to the overcurrent protective device.
6 Overcurrent protection
6.1 Protection of positive conductors
The ELV installation shall be protected by at least one overcurrent protective device for each circuit which disconnects the circuit in the case of overload or short circuit. The nominal current I,. of this protective device shall not exceed the permissible current rating I of the cable.
The overcurrent protective device for the power supply from the towing vehicle shall be fitted as near as possible to the auxiliary battery, but in no case more than 1 000 mm away. The overcurrent protective device for the auxiliary battery shall be fitted at the end of the battery cable within a cable length of 1 000 mm from the auxiliary battery or its compartment and before the fixed installation. In cases where no auxiliary battery is installed, the overcurrent protective device shall be installed before the fixed installation. The ELV output of any transformer/rectifier unit and of any DC generator shall be provided with a suitably rated overcurrent protective device located between the transformer/rectifier unit or DC generator and any distribution panel or board unless such a protective device is incorporated in the transformer/rectifier unit or the DC generator.
6.4.1 Overcurrent protection devices
Overcurrent protective devices shall not be fitted in a fuel storage compartment or fuel storage housing intended for the storage of liquefied petroleum gas cylinders or in the compartment for housing an auxiliary battery whose electrolyte can flow in case of malfunction.
6.4.2 electrical equipment in LPG storage compartment
No electrical equipment including wiring systems, except
a) ELV (extra low voltage) equipment for gas supply control,
b) other electrical equipment which is proofed for at least category II 3G Ex hA T2 according to Directive 1999/92/EC, Annex Il, 13, and
c) cables running through a gas compartment without connection
shall be installed in any LPG storage compartment.
Such electrical installations and components shall be constructed and installed so that they are not a potential source of ignition. Where cables need to run through such a compartment, such cables shall be protected against mechanical damage by installation within a conduit or duct passing through the compartment. Where installed in a position where it is likely to be subject to mechanical damage, this conduit or duct shall be able to withstand an impact equivalent to AG3.
7 Installation of appliances
7.1 General
Appliances suitable for operation on both AC and DC 12 V systems are allowed provided that AC and DC systems are segregated and interconnection is prevented.
7.2 Selection and connection of appliances
All appliances shall be fitted, connected and fused in accordance with the appliance manufacturer’s instruction.
If the appliance manufacturer’s Instruction does not include any requirements for a fuse protection, the cables of the appliance shall be protected according to HD 60364-4-43.
7.3 Socket outlets
ELV socket outlets shall provide a means to ensure that correct polarity is made by the connector and shall be of a different type from those provided for any low voltage installation. EN 1648-1-2017 pdf download.