What is the difference between NEMA 3 and NEMA 4 on TOTALPAC X, and when should I choose each?
Choose NEMA 3 for general outdoor weather exposure. Choose NEMA 4 when stronger water-ingress protection is needed, including splashing or hose-directed water.
What the option means
FireFlex documentation states TOTALPAC X is designed for installations exposed to outdoor and/or freezing conditions. It is available in NEMA 3 or NEMA 4 construction depending on the environment.
When to choose NEMA 3
Choose NEMA 3 when the enclosure must resist:
- rain
- sleet
- snow
- windblown dust
- external ice formation
This is a common choice for normal outdoor exposure.
When to choose NEMA 4
Choose NEMA 4 when the enclosure must handle:
- all typical outdoor weather conditions, plus
- splashing water
- hose-directed water
This is the better choice for harsher industrial washdown or more aggressive exterior exposure.
Compliance point
Choosing the right NEMA enclosure is part of environmental compliance. The wrong enclosure can create inspection issues even if the fire protection logic itself is correct.
Frequently Asked Questions
Is TOTALPAC X intended for outdoor installation?
Yes. FireFlex documentation specifically states it is designed for outdoor and/or freezing conditions.
Do I still need heat tracing or heating?
Possibly. FireFlex documentation says to consider the heating option for those conditions.
Is NEMA 4 always required outdoors?
No. NEMA 3 may be sufficient for many outdoor projects. Choose NEMA 4 when the environment is harsher.
Where can I review the product family?
TOTALPAC X product information is available online.