Voltage Drop in Cable

no

Higher being higher than 415V, a usual terminology, for single high volatge lines not have dual or 3 core.

Did not notice anything angy in my comment??? Don't recall mentioning heat 101, though do recall mentioning heat from EMF in a coiled line, which will occur no matter how well rated the cable (for those who do not understand electricity and EMF and choke)

Lastly Armour for a cable has no EMF rating at all, though I love the term earthy, not sure whether that implies "your cable" has dirt in the sleeve or some new active line with an earth wire wrapped around it. Armour cables are for physical damage protection.

_{<sigh> 'tis hopeless}

you got my vote :)

Lynlynch

The simple answers are the best... GA from me!

Thanks. I see that my many admirers don't agree with you.

It brings me pleasure to know that that many peopple have such strong feelings about me.

Yes. 1D (one time of diameter) is from center to center is minimum acceptable spacing.

errr.. WRONG!!

spacing of cables, that is, the distance BETWEEN the cables themselves, has NOTHING to do with the voltage drop ALONG the length of the cable. If you would like a detailed explanation of the correct answer please ask.

Unlikely that this will effect the voltage drop in your cable for most cases, but once again there is insufficient information to tell. If the spacing in your cable is the inter-wire spacing around an iron core then clearly less turns (for the same volume) around the core will produce a lower inductance and a different voltage drop. If this is a radio frequency transmission cable then a different set of concerns come into play. I could go on but I think I made my point.

No, not normally. The spacing is to get rid of heat in the cable (I²R heating). Your local supply authority will have a standard you'll have to use.

Standards are a way of removing all thought from the design process. If you follow the standards it will always work BUT they don't always give the best solution.

I've tried arguing that a cable could be undersized as the load at the end was intermittent and insensitive to the voltage drop. No luck, it has to be done "by the book".

I agree that one should go by standards for cable manufacturing and installation both. Custom cable can be manufactured for a specific installation with well defined specifications that others can understand else will cause serious problem sometime.

Fire, short circuits are crucial considerations.

Method of cable laying will decide the current carrying capacity of cable, which is a parameter for voltage drop calculation. spacing is another derating factor used in current carrying capacity. ...so it is YES

NO! Voltage drop is the product of cable size, distance, conductivity of the material the cable is manufactured from and resistance. However: where resistance results in heating of the conductor spacing according to code and asst. specifications.

TMF

Waddamean "every one"! Vaseline that "Neutral Zero" soapbox - I'm a coming after U Bitch (oops) Birch, ,

LOL.. present company excepted of course :)

Woof

no voltage drop uses the formalur of 2 x the distance times the constants of alum x the amprage at the load. over the cma of the wire.

2L x K x ampas

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cma of wire. natiional code alllows for 3 % drop.

Check this for your answer ..http://cr4.globalspec.com/thread/57184#newcomments

It has nothing to do with voltage drop in the cable. The cables can be laid in any formation possible i.e., spaced, touching, trefoil formation, one above the other etc. However, the cable rating (current carrying capacity) does get affected by the cable laying method.

BBRaina