Never use connectors in a housing wiring circuit like you suggested because it will not be properly insulated. You must use a proper junction box which is BS approved.
George Clarke, March 2009
http://cache2.smarthome.com/images/84720tb.jpg
Terminal Block - comes in strips - cut off what you need
Peccavi, February 2009
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I can answer this question...
How can I join two pieces of standard (internal) electrical cable?