Hello,
I am going to buy a momentary on/off switch in a power line for operating an accessory. Many of the descriptions online say that the switch is "Normally On." What does this mean please? Does it mean that the circuit is connected, with juice running through it, until you push the button, which turns it off? Or does it mean that the circuit is not connected, until you push the button and the power goes through?
Thanks,
Mannyrock
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Ooops, correction, I mean't to type that the switch description says, "Normally Open", not "Normally On." What does this mean please?
Mannyrock
Normally Open (circuit) - no current flows until the device is activated. This terminology applies to switches and relays.
NO= Normally Open- no current flow until switch is operated
NC= Normally Closed- Current flows until the switch is operated
Good to hear from you again Manny.....Yeh, it means that nothing happens till you "throw/push/pull the switch" and the accessory will start to operate.
They are "spring-loaded" to keep them in the "off" position till you "pull the trigger" again.
Peter.......Buco Australia
These are all good answers with the following footnote: the system is at rest, no energy is applied.
in essence, no buttons are being pushed, no switches are toggled, and no electric power is available to enable a relay coil.
sorry to be so detailed but UL508 Standard for Safety specifies this.
Lou N
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