In article , "RBM" rbm2(remove wrote:
It may make more sense to run emt or wiremold on the exterior of the block,
but if you want to run cable inside the block you may need to use cable like
UF or other cable for wet or damp locations

NM ("Romex"), NMC, and NMS are explicitly Code-approved "to be installed or
fished in air voids in masonry block or tile walls." [2005 NEC, Art.
334.10(A)(2), (B)(2), and (C)(2) respectively]

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Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.