CDCM

Before CDCM, each DNO had slightly different approaches to naming and structuring their tariffs, making comparison difficult. Since April 2022, all DNOs use the same 32 standardised tariff categories with consistent naming conventions.

The 32 CDCM tariff categories:

Domestic (2):

• DOM_AGG - Domestic Aggregated
• DOM_AGG_REL - Domestic Related MPAN

Non-Domestic Aggregated (6):

• ND_AGG_NR - No Residual
• ND_AGG_B1 through ND_AGG_B4 - Bands 1-4
• ND_AGG_REL - Related MPAN

LV Site Specific (5):

• LV_SS_NR, LV_SS_B1 through LV_SS_B4

LV Sub Site Specific (5):

• LVS_SS_NR, LVS_SS_B1 through LVS_SS_B4

HV Site Specific (5):

• HV_SS_NR, HV_SS_B1 through HV_SS_B4

Generation (8):

• LV_GEN_AGG, LVS_GEN_AGG, LV_GEN_SS, LVS_GEN_SS, HV_GEN_SS
• Plus NRP (No RP Charge) variants

Unmetered (1):

• UMS - Unmetered Supplies

This standardisation makes it much easier to understand and compare distribution charges across regions. The same tariff category means the same thing whether you're in London (DNO 12) or the Scottish Highlands (DNO 17) - only the actual rates differ.