Section 2 – Installation
Recreational Vehicle Generator
2.4.2 GENERATOR FUEL SUPPLY LINE
2.4.2.1 Rigid Fuel Lines
Those lines used to supply fuel from a tank to the generator must comply with applicable codes, standards and regulations. The following general rules apply to rigid fuel lines:
•Rigid lines should be of annealed, seamless, drawn aluminum or steel.
•Lines and fittings must comply with SAE J512F, “Standard Automotive Fittings,” or with ANSI B126.26 (latest edition).
•Route the fuel line so that at least 2 inches (51 mm) of clear- ance is maintained between the line and any exhaust system parts.
•Do not attach electrical wiring to fuel lines. Route the wiring so it cannot come into contact with any fuel line.
•Route fuel lines so if they leak, fuel does not drip onto any electrical or exhaust system parts.
•Use nonferrous metal straps without sharp edges to secure fuel lines.
2.4.2.2 Flexible Fuel Line
Use an approved flexible length of fuel hose between the generator fuel inlet connection and rigid fuel lines. This prevents breaking of the line caused by vibration, shifting, settling or movement. The following rules apply:
•The flexible hose must comply with SAE J1737 (30R7), “Standard for Fuel and Oil Hose.” It must be approved for use with gasoline and low permeability.
•The hose should be at least 6 inches (152 mm) longer than is needed to prevent the hose from rupturing if the generator shifts or settles.
2.5LP GAS FUEL SYSTEM
DANGER 
LP gas is highly EXPLOSIVE. The gas is heavier than air and tends to settle in low areas. Even the slightest spark can ignite it and cause and explosion. Only competent, qualified people should be allowed to install, test, adjust or ser- vice an LP gas fuel system. Install the optional fuel system in compliance with applicable codes, standards and regulations. After the installation, do not do anything that might render the system in noncompliance with applicable codes and standards.
The LP powered range of generators are fitted with a nonadjust- able, factory set system. These systems are
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2.5.1 PARTS NOT INCLUDED IN FUEL SYSTEM
The propane fuel system does NOT include such items as (a) gas tank, (b) gas piping, (c) fittings, (d) valves, and (e) primary regula- tor, used to store the gaseous fuel and deliver it to the gaseous fuel solenoid (Figure 2.15).
DANGER 
Use only approved components in the fuel sup- ply system. All components must be properly installed in accordance with applicable codes. Improper installation or use of unauthorized components may result in fire or an explosion. Follow approved methods to test the system for leaks. No leakage is permitted. Do not allow fuel vapors to enter the vehicle interior.
Figure 2.15 – Typical Propane Gas Fuel System
2.5.2 SOME IMPORTANT CONSIDERATIONS
When installing an LP gas system, consider seriously the following items:
•All fittings, lines, hoses and clamps must be tight and free of leaks. Apply a pipe sealant to threads when assembling thread- ed connections. This reduces the possibility of leakage.
•Test the entire fuel system for leaks using approved test meth- ods.
•Optimum gas pressure at the inlet to the gaseous fuel solenoid valve and secondary regulator is 11 inches water column.
•The installer’s fuel supply connection point is at the gaseous fuel solenoid valve. This is a
•Use a length of approved flexible fuel hose between the gaseous fuel solenoid valve and rigid gas piping. The flexible line should be at least six (6) inches longer than necessary.