On 02/01/2011 23:51, Frank Erskine wrote:
On Sun, 2 Jan 2011 15:33:02 -0800 (PST), Andy Dingley
wrote:

On Jan 2, 11:15 pm, wrote:

...or good earth contacts to the bulb caps.

A bulb with a failed cap contact just goes out.

A cluster with a failed earth to the cluster shows ghost ilumination
through other bulbs (usually stop or fog, as they're the lowest
impedance)

Impedance? Are we talking AC car batteries here? ;-)))


Car batteries run on AC with zero frequency and phase angle.g
--
Cheers,
Roger
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