That might be true for normal electrical loads, but I'd be very leery of expecting them to carry starting loads. Not because of explosion risk, but the risk of weakening and eventually failing the tubing inside the braid due to heating the braid during starting events.
Automotive example: I once owned one of the 1st front wheel drive cars sold here in the USA. After a warranty repair at the dealership, the car became progressively and intermittently harder and harder to crank, as if it had a bad battery, though the battery was good and its connections clean and tight. This went on for literally years, until one day when I had the hood open and had someone try to start it. When they hit the starter, I saw smoke coming off the clutch actuating cable. The dealer had left the braided ground strap loose on one end, and the only ground from engine to the chassis was through the clutch cable. If it had been a hydraulic line instead of a Bowden style cable, I'm confident that the rubber inside would have been damaged and would have eventually failed.
Charlie