w_tom wrote:
On Aug 25, 9:51 pm, "Percival P. Cassidy" wrote:
The advertising for some wirenuts (don't recall which) says that
twisting isn't necessary. But I have no idea whether it really does vary
from brand to brand.

Let's say wires are not twisted. Then the only reliable connection
between wires is the 'spring' inside a wire nut.

The contact is wire-to-wire.

With aluminum wire,
this same poor workmanship too often causes fire. See pictures and
technical explanation in:
http://www.inspect-ny.com/aluminum/pl2p8.htm

With aluminum wire surface oxide may prevent wire-to-wire contact. The
wirenut spring is not intended to be a major current carrying element.

Not seen - requirements from any manufacturer, or UL or the NEC that
wires be twisted. Apparently none of them are as smart as w_.

As with many other issues all you have is w_’s certainty.

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