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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Update posted by MMasztal on July 6, 2006 at 09:24:43:
Surge/lightning protection will also be installed at that time.
In a high keraunic area like South Fl, you would need two protections: one immediately following the mains breaker (type-2 @45KA according to simulation, but check against your local code, as always), a second protection at at least 5 meters from the first one (to get "natural" inductance), a type-1 @15KA (faster than the bulk type-2 protector at entrance). For example on the feed to your expensive equipement. Then a third protection immediately before your equipments (a plug protector at 5KA is fine). Don't use this light protector alone, it would be burnt away (and the equipment connected to too) by a stroke on the line.
With this double or triple level protection, overvoltages won't arm, even a normal stroke on the mains.
As for insurance by power company, don't forget that an overvoltage can harm your equipment without putting it out of order.
A high voltage pulse can generate high currents with high di/dt.
Given the way most audio equipment is wired (many manufacturers don't seem to know the meaning of EMI/RFI testing...),
these high currents are likely to induce voltage surges in your equipments wire loops, if any.These sudden surge won't necessarly destroy your equipment, but can dig holes in high voltage caps in tube gear, or change parameters (like offset) in SS gear,etc etc.
Result: your sound can be degraded. Just degraded, not yet plain crappy...
Try to explain that to the insurance man or -maybe worse- woman ;-))Additionally, he'll be checking for proper tightening of the other wiring at the panel.
Have him also check than nowhere neutral and ground are intermixed, but only tighted together at one point in your service disconnecting means (the main breaker). It is an excellent recipe for hum, buzz etc.
Throw a look to the article I wrote some time ago for an inmate who had the problem, and was able to solve it this way (skip first paragraphs, which were specific to his case.
Good luck, and play it safe!
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Follow Ups
- Good decision. - Jacques 11:39:44 07/06/06 (1)
- Thanks for the input nt - MMasztal 12:09:54 07/06/06 (0)
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