You're looking for a free PDF of the NECA Manual of Labor Units. Here's what I found:
The NECA Manual of Labor Units (MOLU) is a widely used reference guide published by the National Electrical Contractors Association (NECA) that provides detailed labor unit estimates for electrical construction projects. The manual helps electrical contractors, estimators, and project managers to accurately estimate labor costs and time required for various electrical installation tasks. neca manual of labor units pdf free