Hi Sir/Madam,
May i know the difference between both of this standards (IEC 61340-5-1 & ANSI ESD 20:20-2014). ?
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Hello and welcome to the forum,
The two standards IEC 61340-5-1 and ANSI/ESD S20.20-2014 are technically equivalent.
The main difference between the two are:
Measurement of insulators - While both have requirements on the measurement of the insulator themselves, IEC 61340-5-1 allows the measurement of the field where the ESDS item is worked on. In the next version of ANSI/ESD S20.20 this measurement is included.
The second difference is ANSI/ESD S20.20 contains references to ESD TR53 for compliance verification measurements. The IEC just released an equivalent document, TS 61340-5-4 which will be in the next version of IEC 61340-5-1.
Every effort is made to keep these two documents technically equivalent.
If you have any other questions, please feel free to post.
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Dear John,
good day.
question regarding technical equivalency of IEC and ANSI. regarding compliance verification, in ANSI, we need to create tailoring if method is different from the table 2 and 3, while IEC stated that the requirement is need to show correlation result. does this mean that no tailoring statement is required? how can we established compliance with the two, if we do not create a tailoring statement in our Program will this be mean that we are not compliance with ANSI if we only provide a technical evaluation or correlation?
please to know your thoughts on this.
thank you.
Dear Experts,
another question, if i am certified to both standard, with regards to requirement on grounding, say i follow our country’s code for grounding and it does not comply with ANSI/ S20.20 of less than 1 ohm impedance and i did not prepare a tailoring for this requirement, will i be noncompliance to ANSI, while i am compliance with IEC? can you enlighten on this requirement.
thank you.
Hi Rose, I can answer both questions. First, if you create a tailoring statement for compliance verification for 20.20 it would be the same as defining the correlation for 61240-5-1. There is some difference between the language in the two documents but in reality they mean the same thing.
As far as the grounding resistance, we have trained the assessors that in North America it is required to be less than 1 ohm. If your country has a different requirement, just state that in the document. The IEC version allows for this as it is more of an international standard.
Remember, for compliance verificaiton, testing of the grounding system is not required at all.
Dear John,
thank you very much for the clarification.
appreciate your prompt response.
regards,
Rose
Dear John,
another question as i go through IEC61340-5-1 2024 version, i’ve noticed that wrist strap bonding point has a RTG limit of less than 5x10^6 ohms, which is by far different from ansi which is less 2ohms. do i need to do tailoring if i used this limit if i am certified on both standrard? please to know your inputs and recommendation.
thank you.
Again, this depends on how you implement the grounding wire. If you just use wire and meet the 2 ohm requirement, then you also meet the IEC requirement of less than 5x10^6 ohms. If you use the IEC limit, then you would need to add a tailoring statement to ANSI/ESD S20.20.
The reason for the difference is to encourage the use of just wire in the ANSI version. With the international version, there were some contries that have that limit. I suggest that you use use wire and meet both standards.
i see.
thank you.
Regards,
Rose