MikeShaw
Member
- Location
- Cypress, CA USA
Do RTD's require seal offs in Class 1 Div 1 areas?
I know that many manufacturers indicate in their documentation "seal off not required", and in general I have been treating them as "non sparking" devices for as long as I can remember. However, I have had a recent installation called into question and a request for a seal-off on the (RTD) device. This particular device indicates that it is rated for use in Class 1 Div 1, and per usual I installed without a seal-off. I don't have the documentation for this particular device (working on getting it now), so I don't know if the manufacturer states that a seal off is not required, but what I am looking for is a more general rule on RTD's. I have had no luck finding any good information on the actual classification of RTD's and whether or not they are ignition sources. I appreciate any assistance and/or code references.
Mike
I know that many manufacturers indicate in their documentation "seal off not required", and in general I have been treating them as "non sparking" devices for as long as I can remember. However, I have had a recent installation called into question and a request for a seal-off on the (RTD) device. This particular device indicates that it is rated for use in Class 1 Div 1, and per usual I installed without a seal-off. I don't have the documentation for this particular device (working on getting it now), so I don't know if the manufacturer states that a seal off is not required, but what I am looking for is a more general rule on RTD's. I have had no luck finding any good information on the actual classification of RTD's and whether or not they are ignition sources. I appreciate any assistance and/or code references.
Mike