Combustion heaters

Combustion heaters shall meet the requirements of 9.2.4.7.1, 9.2.4.7.2, 9.2.4.7.5 and the following:
(a) The switch may be installed outside the driver's cab;
(b) The device may be switched off from outside the load compartment; and
(c) It is not necessary to prove that the heat exchanger is resistant to the reduced afterrunning
cycle.
In addition for FL vehicles, they shall meet the requirements of 9.2.4.7.3 and 9.2.4.7.4.

If the vehicle is intended for the carriage of dangerous goods for which a label conforming to models
Nos. 1.5, 3, 4.1, 4.3, 5.1 or 5.2 is prescribed, no fuel tanks, power sources, combustion air or heating
air intakes as well as exhaust tube outlets required for the operation of the combustion heater shall be
installed in the load compartment. It shall be ensured that the heating air outlet cannot be blocked by
cargo. The temperature to which the load is heated shall not exceed 50 ºC. Heating devices installed
inside the load compartments shall be designed so as to prevent the ignition of an explosive
atmosphere under operating conditions.

Electrical equipment

The electrical installation on FL vehicles shall meet the relevant requirements of 9.2.2.1, 9.2.2.2,
9.2.2.4, 9.2.2.5, 9.2.2.6, 9.2.2.8 and 9.2.2.9.1.
However additions to or modifications of the electrical installations of the vehicle shall meet the
requirements for the electrical apparatus of the relevant group and temperature class according to the
substances to be carried.
NOTE: For transitional provisions, see also 1.6.5.
 
1 ECE Regulation No. 111: Uniform provisions concerning the approval of tank-vehicles of categories N and O
with regard to rollover stability.

Electrical equipment on FL vehicles, situated in areas where an explosive atmosphere is, or may be
expected to be, present in such quantities as to require special precautions, shall be suitable for use in
a hazardous area. Such equipment shall meet the general requirements of IEC 60079 parts 0 and 14
and the additional requirements applicable from IEC 60079 parts 1, 2, 5, 6, 7, 11 or 18. The
requirements for the electrical apparatus of the relevant group and temperature class according to the
substances to be carried shall be met.
For the application of IEC 60079 part 14, the following classification shall be used:
ZONE 0
Inside tank compartments, fittings for filling and discharge and vapour recovery lines.
ZONE 1
Inside cabinets for equipment used for filling and discharge and within 0.5 m of venting devices and
pressure relief safety valves.

Permanently energized electrical equipment, including the leads, which is situated outside Zones 0
and 1 shall meet the requirements for Zone 1 for electrical equipment in general or meet the
requirements for Zone 2 according to IEC 60079 part 14 for electrical equipment situated in the
driver's cab. The requirements for the relevant group of electrical apparatus according to the
substances to be carried shall be met.

Additional safety requirements concerning EX/III vehicles

EX/III vehicles shall be equipped with automatic fire extinguisher systems for the engine
compartment.

Protection of the load by metal thermal shields against tyre fire shall be provided.

9.8

ADDITIONAL REQUIREMENTS CONCERNING COMPLETE AND COMPLETED MEMUs

General provisions

In addition to the vehicle proper, or the units of running gear used in its stead, a MEMU comprises
one or more tanks and bulk containers, their items of equipment and the fittings for attaching them to
the vehicle or to the running-gear units.

Requirements concerning tanks and bulk containers

Tanks, bulk containers and special compartments for packages of explosives of MEMUs shall meet
the requirements of Chapter 6.12.

Earthing of MEMUs

Tanks, bulk containers and special compartments for packages of explosives made of metal or of
fibrereinforced
plastics material shall be linked to the chassis by means of at least one good electrical
connection. Any metal contact capable of causing electro-chemical corrosion or reacting with the
dangerous goods carried in the tanks and bulk containers shall be avoided.

Stability of MEMUs

The overall width of the groundlevel
bearing surface (distance between the outer points of contact
with the ground of the righthand
tyre and the lefthand
tyre of the same axle) shall be at least equal to
90% of the height of the centre of gravity of the laden vehicle. In an articulated vehicle the mass on
the axles of the load-carrying unit of the laden semi-trailer shall not exceed 60% of the nominal total
laden mass of the complete articulated vehicle.
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