What is the minimum separation between a wire bundle and a fluid line carrying combustible fluid or oxygen, when possible?

What is the minimum separation between a wire bundle and a fluid line carrying combustible fluid or oxygen, when possible?

• A. Three inches
• B. Six inches whenever possible. If not practical, the wires should not run parallel to fuel or oxygen lines and a minimum of two inches must be maintained.
• C. One inch
• D. Ten inches

Answer: (B)

Keep electrical wiring well away from lines carrying combustible fluid or oxygen to reduce ignition risk in the event of a leak or electrical fault. The recommended guideline is six inches of separation whenever possible. If that distance isn’t practical, route the wires so they do not run parallel to the fuel or oxygen lines and maintain at least two inches of separation. This helps minimize heat transfer and the chance of igniting leaking fuel or oxidizer. The other distances don’t align with the standard practice: one or three inches are too close for reliable protection, and ten inches is more than necessary when six inches is feasible.

Keep electrical wiring well away from lines carrying combustible fluid or oxygen to reduce ignition risk in the event of a leak or electrical fault. The recommended guideline is six inches of separation whenever possible. If that distance isn’t practical, route the wires so they do not run parallel to the fuel or oxygen lines and maintain at least two inches of separation. This helps minimize heat transfer and the chance of igniting leaking fuel or oxidizer. The other distances don’t align with the standard practice: one or three inches are too close for reliable protection, and ten inches is more than necessary when six inches is feasible.