It might in Whitby, ON, Canada, where you are located, but it wouldn't satisfy the requirements of the NEC here in the US.
The code here says the coax shield should be grounded with a grounding block that is connected to the house electrical system ground with 10 gauge copper wire for electrical safety and to reject interference. For further compliance with the electrical code (NEC), the mast should also be grounded in a similar manner to drain any buildup of static charge, but the system will not survive a direct strike.
So, when you say the antenna was grounded at the fuse box, do you mean the mast and the coax were grounded there or only the coax?
Based on my experience, the first thing to do is to ground the coax with a grounding block connected to the house electrical system ground for electrical safety to protect you from electrical shock.
An example:
Getting A/C voltage on converter box's antenna input !
http://www.digitalhome.ca/forum/81-o...ml#post1457594
Equipment Leakage Current
http://www.digitalhome.ca/forum/81-o...ml#post1457668
There is a grounding thread on the Canadian DHC forum:
Grounding OTA / Dish / CATV / Telecom - See Post 1
http://www.digitalhome.ca/forum/15-h...-post-1-a.html