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# High Voltage AC and DC

Discuss High Voltage AC and DC in the Electrical Forum area at ElectriciansForums.net

#### skellyeo03

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Welcome to ElectriciansForums.net - The American Electrical Advice Forum

Can someone explain to me exactly why high voltage is classed as 1000 for AC and 1500 for DC?

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B

#### Bobster

To do with how far the electricity will arc in a nutshell.

Edit: miss understood the question as to why the values were different. The above is why this level was chosen.

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#### R-fur

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The AC voltage is RMS, if you convert to peak it will be close to the DC value.

B

#### Bobster

^^ this is also true, off the top of my head, is around 1400v peak.

#### telectrix

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is that root 2 in decimal? 1000 x 1.414. where does x10 come in?

B

#### Bobster

Vrms = 0.707 * Vmax

#### telectrix

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or Vmax = rms div. by 0.707

#### telectrix

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but that's peak V, not peak-peak for that it's x2, (no 10's in hrere)

B

#### Bobster

Vrms = 0.3535 * Vpp

Or

Vpp = Vrms/0.3535

#### telectrix

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Vrms = 0.3535 * Vpp

Or

Vpp = Vrms/0.3535
have a metric cigar. the Havana ones are 304.8mm long.

#### Moley

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To do with how far the electricity will arc in a nutshell.
Does this vary depending on the type of nutshell? Would it arc further in a walnut compared to a peanut?

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