wire pull info

["john matthews" <john__matthews@hotmail.com>]

Hi,

I'm finally about to rewire my shop and need to pull new wire for a 
sub-panel. The problem is my electrician specified #4 thhn wire and I only 
have a 1" conduit. The conduit runs under a concrete slab so I don't really 
want to replace it. Any tips for getting three #4 and one #10 wires through 
the conduit? There are at least two 90 degree turns I know of.

Thanks,

John