Went on a service call for intermitent flickering lights today at a large residence. My first thought was loose neutral or connection. All connections checkout okay.
Of course the power quality showed not signs of trouble until I was ready to leave and the lights began to evenly pulse (not really what I would call flicker for about 30 seconds).
The house is feed underground from a pad mount vault type transfromer. This transformer feeds no other houses. My feeling is the problem lies with the transformer.
Has anyone ever encountered a similar problem or pulsing lights (not flickering or brown out)?
