MAINS (1)

the principal conductors for conveying electricity. —Academy Level 0 Glossary Approved 3-12-90, —Grad V Approved 1992 Glossary Upgrade, —SHSBC Binder 10 Approved Glossary, —SHSBC Binder 11 Approved Glossary, —SHSBC Binder 15 Approved Glossary, —SHSBC Binder 25 Approved Glossary