Unfortunately over the years, electrocution due to water fed poles being used near overhead power-lines of under 1,000 volts has been fatal for window cleaners. If working in high voltage areas Spinaclean can offer a Protector Pole Handle, in addition to the SkyVac Reach pole.
BS: 8020 is the specification for insulating hand tools for work on or near conductor rail systems operating at voltages up to 1000 V.a.c. or 1500 V d.c.
The IEC 60855 and EN 50508:2011 addresses the electrocution risk for window cleaners, dramatically minimising casualties resulting in severe burns and even fatalities. This is particularly important when cleaning photovoltaic panels.