current danger dangerous distribution electric electrical electricity energy facility grid high insulator insulators power station sundtech supply voltage electric-power electricity-poles electricity-power-lines equipment height high-voltage high-voltage-equipment light power-poles power-supply strength sub-station transformers wires wiring advice advising alert attached bolted communicating communication concern cracked cracks electricity-supply information informing metal raised red safety security shadows sign signage symbol symbolic volts warning warning-sign white wording Asia availability common connected connections contact contacts electrical-supply electrical-wiring fixtures haphazard hazard hazardous overhead-power-lines pervasive public-utility safety-issues tangle tangled tangles widespread black communicate overhead power-lines protect protection risk risks risky yellow engine gas generator machinery mobile service tools