Why do some homeowners insist on using a double-pole switch? What’s the reason for that?
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Description: Body or Cage Material: SS. Connection Size & Location: 2” – connections on the upper and lower sides. Connection Type: Flanged, #300. Measuring Range: 0–3500 mm. Displacer or Float Material: SS316. Function: Switch and indicator. Mounting: Integrated, IP 65 protection. Upper liquid: Steam; Lower liquid: Water. Specific Gravity of upper liquid: 0.00006; Specific Gravity of lower liquid: 0.99. Maximum pressure: 1.5 bar; Normal pressure: 0.09 bar. Maximum temperature: 120°C; Normal temperature: 43.78ºC. Number of contacts: 1; Contact type: DPDT. Number of switches: 5. Contact rating: 30V DC, 2A. Switch type: Microswitch. Contact action: Multi-point level switch. Since most manufacturers cannot produce DPDT switches, it is recommended to use SPDT switches; however, if the client insists on using DPDT switches, what is the reason for this – is it for safety reasons or something else?
It is likely to be for greater safety and reliability; moreover, standards also recommend the use of the DPDT type
Reply to 2# soar100: It is recommended to use it, but it’s not mandatory. What’s the reason? What is the principle behind the reliability of dual-blade knives?
For a double-pole double-throw switch, how do you wire it? Do you connect the two wires of NO (or the two wires of NC) together, and at the same time connect the two wires of COM together to the junction box, or do you use all four wires to reach the junction box and then combine them into two connections? Are there any requirements in this regard?