Box for NP-series buttons, grey, 1-h

NPH1 Series Pushbutton Box.
Electric ratings: AC50/60Hz, AC415V/DC250V; Degree of protection: IP65; Standard: IEC/EN60947-5-1

2. Operating conditions

2.1 Ambient temperature is -5℃~+40℃, the average temperature during 24 hours couldn't exceed +35℃.
2.2 Altitude: ≤2000m.
2.3 Atmosphere condition: Relative humidity of the atmosphere couldn't exceed 50% when the highest temperature is +40℃; much higher relative humidity is allowable under the condition of lower temperature, for example, when the temperature reaches +20℃, the relative humidity is up to 90%. As for dews, which contingently appear due to change of temperature, special steps should be taken.
2.4 Pollution grade: 3
2.5 Installation category: Ⅱ
2.6 Tightening torque is 0.8~1.2N·m for the cable terminals. Cross section of the cable connection is 0.5~2.5mm2, and 8mm conductor length is needed.