Protective Earth Bar for AC and DC voltages
Protective Earth Bar for AC and DC voltages
(OP)
For the one of the packages to be installed in a NORSOK project. The Package vendor is supplying the control panel. CONTRACTOR provided one 690V AC connection to the control panel, vendor will derive all the auxiliary connections required for the package from this.
24 V DC required by the package instrumentation and the same is derived. This 24 V DC is used to power the instruments inside the package.
Now the query is, Vendor connecting OV line of the 24V DC connection and an electrical ground connection (AC) in the same PE bar.
Third Party Agency is saying that good engineering practice is to make the PE bar separate for the AC and DC connection. As far as we seen, NORSOK doesn't say anything for this requirement.
Why having separate PE bar for AC and DC connection? Pls advise.
24 V DC required by the package instrumentation and the same is derived. This 24 V DC is used to power the instruments inside the package.
Now the query is, Vendor connecting OV line of the 24V DC connection and an electrical ground connection (AC) in the same PE bar.
Third Party Agency is saying that good engineering practice is to make the PE bar separate for the AC and DC connection. As far as we seen, NORSOK doesn't say anything for this requirement.
Why having separate PE bar for AC and DC connection? Pls advise.






RE: Protective Earth Bar for AC and DC voltages
RE: Protective Earth Bar for AC and DC voltages
everyone has an opinion
National Electrical Code (ANSI/NFPA 70) — Article 250 of
this code provides information about the types and sizes of
conductors and methods for safely grounding electrical
equipment and components. Articles 725-5, 725-15, 725-52, and
800-52 restrict the placement of different types of conductors in a
composite cable, a raceway, or a cable tray.
• IEEE Recommended Practice for Grounding of Industrial and
Commercial Power Systems (IEEE Std 142-1991)
• Grounding for the Control of EMI (by Hugh W. Denny —
publisher, Don White Consultants Inc., 1973)
• Electromagnetic Interference and Compatibility, Volume 3 (by
R.J. White — publisher, Don White Consultants, Inc., 1981)
• Military Handbook 419, “Grounding, Bonding, and Shielding for
Electronic Equipment and Facilities”
• IEEE Guide for the Installation of Electrical Equipment to
Minimize Electrical Noise Inputs to Controllers from External
Sources (IEEE Std 518-1982)
• IEEE Recommended Practice for Powering and Grounding
Sensitive Electronic Equipment (IEEE Std 1100-1992)