jmargolis79
Member
- Location
- minneapolis
Has anyone instaled heat tape in a class 1 div 1 location? De you have a brand name or model number?
Heat tape in class 1 div 1
- Thread starter jmargolis79
- Start date
- Status
Check out "Tyco" they are a heat tracing company that works with these applications....You will need to know that flash points of the process your dealing with so the system can be designed to not exceed that temperature. Usually a temperature controller is involved...and the tracing may be required to me mineral filled tracing which has a metal sheath encapsulating the element.
The systems I've been around had a ambient t-stat for reference to the controller, and the tracing wattage/ft was designed to the process flow and pipe sizes. If your system is small in nature it might be all that complicated, however if its large, I would let someone design the system.
Last edited:
Raychem and Thermon are two companies we have used before. I have purchased a fair amount of Thermon Class 1 Div 2 heat trace recently. I send my distributor the application information and they do the thermal calcs for sizing the cable. For example, I might tell them that I have a 2" steel water line 80 ft long with one valve that will have 1-1/2" calcium silicate insulation on it, and that I'm looking for freeze protection. We have been using solid state controllers with RTDs for the temperature control rather than traditional thermostats. The RTD can be mounted on the pipe or can be an ambient sensor.
Ground fault protection (30 mA trip setting) is required for the circuits feeding the heat tracing. This can be provided by the circuit breaker or Thermon will sell you a GFP module that is wired ahead of the controller.
Ground fault protection (30 mA trip setting) is required for the circuits feeding the heat tracing. This can be provided by the circuit breaker or Thermon will sell you a GFP module that is wired ahead of the controller.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
In the Article 500/501 world, heat tracing is ?Utilization Equipment? and installed under Section 501.135. In Class I, Division 1 it has to be identified; not necessarily listed or labeled. However see how the ?uitability of identified equipment shall be determined?? in Section 500.8(A).
With the exception of Thermon, most of the old ?tape-type? companies are now divisions of Tyco. Between them they produce the bulk of the power-limited and self-regulating cables.
Several of their products, including MI cable based heaters, have FM and CSA certification for Class I, Division 1. Technically, I would call that ?identified? under 500.8(A) and (B). However, I don?t believe any are UL listed for Division 1. Neither FM nor CSA certifies the cables to UL 515 which is the only FedOSHA recognized product standard.
With the exception of Thermon, most of the old ?tape-type? companies are now divisions of Tyco. Between them they produce the bulk of the power-limited and self-regulating cables.
Several of their products, including MI cable based heaters, have FM and CSA certification for Class I, Division 1. Technically, I would call that ?identified? under 500.8(A) and (B). However, I don?t believe any are UL listed for Division 1. Neither FM nor CSA certifies the cables to UL 515 which is the only FedOSHA recognized product standard.
- Status