Contact form question needs more information

[mcmahanrf]

509
Identify the contact pictured above.


Form A
Form B
Form C
Form D

This question needs more information or the possible answers need to be changed. This schematic could refer to either a form C or D contact setup as the difference between those is in operating sequence, not in form.










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[bec51392]

The various "forms" are described and laid out in NEMA ICS 5. "Form D" is non existent according to NEMA. IEEE C57.2 also doesn't call out a D, or even a C for that matter. Sometimes you just have to pick the best one.

You can download ICS 5 here for free.
https://www.nema.org/standards/view/control-circuit-and-pilot-devices

[RabbleRabble]

509
Identify the contact pictured above.


Form A
Form B
Form C
Form D

This question needs more information or the possible answers need to be changed. This schematic could refer to either a form C or D contact setup as the difference between those is in operating sequence, not in form.

This website is a great resource but there is some miss information. Form D contacts are used and available from various suppliers. If the question is for NEMA forms only. Asking ”what NEMA form contact is this” would be less confusing.

https://standexelectronics.com/resources/glossary/

[testguy]

This website is a great resource but there is some miss information. Form D contacts are used and available from various suppliers. If the question is for NEMA forms only. Asking ”what NEMA form contact is this” would be less confusing.

https://standexelectronics.com/resources/glossary/

Thanks for the feedback. Form D will be replaced to help eliminate confusion in the future.

[joaogemal]

509
Identify the contact pictured above.


Form A
Form B
Form C
Form D

This question needs more information or the possible answers need to be changed. This schematic could refer to either a form C or D contact setup as the difference between those is in operating sequence, not in form.

There's a Wikipedia about Electrical contacts, take a look.

https://en.wikipedia.org/wiki/Electrical_contacts

[Izeldeen]

509
Identify the contact pictured above.


Form A
Form B
Form C
Form D

This question needs more information or the possible answers need to be changed. This schematic could refer to either a form C or D contact setup as the difference between those is in operating sequence, not in form.
d