On Sun, 13 Jul 2008 21:20:01 -0700 (PDT), w_tom wrote
Re "chain" surge suppressers?:

The Delta protector appears to have specs significantly above
minimum.

Thanks for the info.

How effective is it? Well does its earthing meet and exceed
post 1990 code requirements?

I don't know. How is the quality of an "earthing" determined or
measured?