Hello,
We have a remediation sump that will be collecting water and free phase hydrocarbon with a submersible sump pump rated for hazardous duty, factory sealed. While this sump hasn't undergone an engineering study, we default the head space of hydrocarbon sumps, wells and tank vents to Class 1 Div 1 where I work. The leads on the pump are too short and so a splice in the wiring is needed to get the wiring out of the sump to the first available enclosure. The splice will take place in the head space of the sump, using butt splices and shrink wrap. The project electricians are puckered up about doing this, but the project manager has convinced them to do it anyways.
My wife is overseeing and is the middleman and posed this question to me because many years ago I was an electrician. Her question is obviously - is this wiring method strictly prohibited by the NEC? I haven't performed electrical work in over a decade, but my first concern is that the splice would need to take place inside a Class 1 Div 1 rated enclosure. Also, I am concerned that if the wiring isn't rated for the classification and there is not a seal gland or hermetically sealed connector on the end, that hazardous vapor could infiltrate the wiring and use it as a conduit to the motor starter.
Any thoughts?
We have a remediation sump that will be collecting water and free phase hydrocarbon with a submersible sump pump rated for hazardous duty, factory sealed. While this sump hasn't undergone an engineering study, we default the head space of hydrocarbon sumps, wells and tank vents to Class 1 Div 1 where I work. The leads on the pump are too short and so a splice in the wiring is needed to get the wiring out of the sump to the first available enclosure. The splice will take place in the head space of the sump, using butt splices and shrink wrap. The project electricians are puckered up about doing this, but the project manager has convinced them to do it anyways.
My wife is overseeing and is the middleman and posed this question to me because many years ago I was an electrician. Her question is obviously - is this wiring method strictly prohibited by the NEC? I haven't performed electrical work in over a decade, but my first concern is that the splice would need to take place inside a Class 1 Div 1 rated enclosure. Also, I am concerned that if the wiring isn't rated for the classification and there is not a seal gland or hermetically sealed connector on the end, that hazardous vapor could infiltrate the wiring and use it as a conduit to the motor starter.
Any thoughts?
