The fire service were called to a garden centre near Maidenhead yesterday.
Alarms were raised at about 1.30pm at Stubbings Estate in Henley Road in Stubbings after a wall mounted transformer caught fire.
Oil dripping from the 11,000 volt transformer onto cars worried the firefighters who set up a 20m cordon to keep the public away.
Southern Electric staff arrived soon after and took over from the firefighters who left by 3pm.
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