A: No. The PEC is based on the NEC but modified. For example, the PEC uses 230V/400V (European style) not 120V/240V. Volts, conduit types, and soil resistivity data are localized. Do not use a USA NEC PDF in the Philippines.
Compliance is enforced by the local AHJ and electrical inspectors. Permits, as-built drawings, and acceptance test reports are typically required. Noncompliance can lead to penalties, forced remediation, or denial of occupancy. Philippine Electronics Code Book 1-4 Pdf
Carrying four physical books to a construction site is heavy and impractical. A PDF version on a smartphone or tablet allows an engineer to immediately check conduit fill ratios or grounding electrode sizes while standing on scaffolding. A: No