
Originally Posted by
KH0UJ
Palihug lang kog basa bro para wa tay daghang lalis

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LINK 1 &
LINK 2
Ground Fault interrupters was not available way back in 1960`s but they already standardized their electrical systems back then, originally they designed their building electrical systems with ground conductors for the main two purpose, lightning safety, and for some frequency emitting units not to interfere with other units...>>>
LINK 3
That`s the reason why the power Supply Unit in our PC`s have capacitors connected from line filter to chassis ground, that is designed for trapping emitting strain frequencies to ground generated by the oscillation of the primary A.C. oscillator, mao pud nay maka kuryente gamay kung di ma connect sa EARTH ground ang mismo PC, I tried removing it on my previous PC`s pero ang resulta nisamut ang emission sa EMI noise nga maka interfere na sa akong FM radio ( minimal distortion) ug sa T.V. (small vertical retraces) inig ON sa akong PC, so I decided to put it back plus connect it to earth ground, karon limpyo na, minimal na ang interference, mu splat na lang siya sa akong VHF tranceiver pero di na siya makita sa TV ug sa FM radio

Bro, ang GFI is different from equipment grounding conductors...
OSHA is about protection devices/equipment for workers when performing any, not just electrical, hazardous services. OSHA means
Occupational
Safety &
Health
Administration and have nothing to do with electrical statutes. OSHA is concerned with workers' safety issues.
FCC link was stipulating type of copper cables to be used. FCC dealt with design specification and nothng to do with electrical codes.
You should read these instead.>>
http://fyi.uwex.edu/mrec/files/2011/...g-MREC2010.pdf or this
Article 250 - NEC Connect and article 725, Class2 and 3 circuits, from Mike Holt (attended numerous of his lectures)
https://www.mikeholt.com/mojonewsarc...s~20021217.htm
Capacitors in electronics equipment are often times implemented as "grounding capacitors' to allow AC current to pass while blocking DC current. Capacitive Reactance formula; Xc=1/2(3.1415)(
Hz)(capacitance in ohms).....zero frequency, in
Hz (dc component) is block while AC component is allowed to pass through grounding bus........
BTW - have fun 'understanding' N.E.C....they didn't call it 'CODE" for nothing
dili ko tig lalis nimo bro....limited raman akong 'understanding' sa grounding and lightning protection. Na katon lang ko sa mga projects gi design naku for FAA airport tower controls, ospital sa Saudi Arabia, maximum penitentiary., update sa 'back-up' servers for yr2K ug uban projects dili ma mention tungod sa "security' confidentials.
usa pa.....lightning protection and building grounding system CANNOT be mixed! They are separate.....read last part of article 725
Hope this helps