Galvanized Steel Roof Panel Vs. Power Lines?

I need to "trespass" on my neighbors roof to paint the back wall of my residence (it seems we share the same cinder block wall). Before I step out there with an aluminum ladder, I examined the area to find power lines lying on the cement roof of the neighbor (not my power lines). The lines also transverse some metal roof panels that have sharp edges. If the insulation doesn't hold up, will sparks fly? Fotos follow the cable from right to left:

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