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Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 4817
Posted: 10:36pm 14 Nov 2011      

32V is may have been chosen because its still a safe voltage, and high enough to minimise wire thickness, compared to 6V ( common in vehicles at the time ) or 12v.

Many of the telecomunications companies use 50V, but this can be lethal in certain situations, its enough to give a muscle twitch. The shock wont hurt you, but the reaction to the tingle can. I once worked on a MDF for Telecom, and 50VDC, or the 75VAC ring current, would make your hand jump back if it made contact, I still have scares on the back of my hands. 24V wont have that effect, and I'll bet either does 32v.

Also, lead acid batteries were usually supplied as 2 volt cells. So 32 volts means 16 cells, a nice number to work with.

Glenn
People say 2020 is a terrible year, with the bush fires, COVID 19, and riots. But I see it as the year we woke up to ourselves.

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