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Old 09-09-2012, 05:19 PM   #20
ThisIsOK

Join Date
Oct 2005
Posts
515
Senior Member
Default
Telstra use arrestors with independent earth stake where the cable outside connects to the internal house phone wiring [junction box], well in the country they do. GDTs mostly have seen.

Still your phone wiring can be fried off the wall with a very near lightning hit, as happened at the wife's house when she was young, in fact as was told the SWER transformer on the pole outside the house was destroyed also. Think it popped oil out the top, which ETSA were glad to know of as saved them spending a day isolating the short on the distribution system.

http://en.wikipedia.org/wiki/Surge_protector
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