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Contact form question needs more information

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  1. mcmahanrf is offline Junior Member Pro Subscriber
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    Contact form question needs more information

    Click image for larger version. 

Name:	Contact diagram.png 
Views:	70 
Size:	4.6 KB 
ID:	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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  3. bec51392 is offline NETA Level III Pro Subscriber
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    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/...-pilot-devices

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  5. RabbleRabble is offline Member Pro Subscriber
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    Quote Originally Posted by mcmahanrf View Post
    Click image for larger version. 

Name:	Contact diagram.png 
Views:	70 
Size:	4.6 KB 
ID:	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/

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    Quote Originally Posted by RabbleRabble View Post
    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.

  8. #5
  9. Join Date
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    FORM D

    Quote Originally Posted by mcmahanrf View Post
    Click image for larger version. 

Name:	Contact diagram.png 
Views:	70 
Size:	4.6 KB 
ID:	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

  10. #6
  11. Join Date
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    Quote Originally Posted by mcmahanrf View Post
    Click image for larger version. 

Name:	Contact diagram.png 
Views:	70 
Size:	4.6 KB 
ID:	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

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