You need hose spiral protectors. For your GPU you will get away with the cheap Chinese stuff at a bout .25 a foot.

Spiral Hose products, buy Spiral Hose products from alibaba.com

This will satisfy ISO14000 for the shielded electronics, power, pneumatics and hydraulics ONLY. For fuel transfer you will have to buy the compliant expensive american stuff:

Hi-Viz Coil Hose Protection

If you operate from improvised strips; layflat. Its agricultural irrigation kit. It is essentially canvas fire hose coated with PVC and its dirt cheap. Any ware you see the john deere or case ih logo you will find it. I'm guessing your not a 'bug smasher' though...