Paul,
Never heard of Wago?
I thought they were used over there.
Here's a picture and link to an announcement saying that they are approved in NY City. Note that they can be used for solid
or stranded wire.
WAGO WALL-NUTS Approved in New York City Wall-Nut Brochure (PDF File)
Bill
[This message has been edited by Bill Addiss (edited 10-13-2002).]