Market Segment
Tariff StructureOne of four categories that classify electricity supplies: Domestic, Non-Domestic, Generation (export), and Unmetered - determining which tariff structures apply.
Every electricity supply in Great Britain falls into one of four market segments, which determines the overall framework of charges that apply. The market segment is encoded in the LLFC and drives which tariff categories are available.
The four market segments:
| Segment | Profile Classes | CCL | Tariff Examples |
|---|---|---|---|
| Domestic | 01-02 | Exempt | DOM_AGG, DOM_AGG_REL |
| Non-Domestic | 03-08, 00 | Subject to | ND_AGG, LV_SS, LVS_SS, HV_SS |
| Generation | N/A (export) | N/A | LV_GEN_AGG, LVS_GEN_SS, HV_GEN_SS |
| Unmetered | N/A | Subject to | UMS |
Segment details:
- Domestic - Residential customers only
- Non-Domestic - All commercial and industrial premises
- Generation - Embedded generation that exports to the network (negative charges possible)
- Unmetered - Street lighting, traffic signals, phone boxes (consumption estimated from inventory)
Why market segment matters: If your LLFC maps to the wrong market segment, your entire tariff framework could be wrong. For example, a small business incorrectly coded as domestic might avoid CCL but face different DUoS rates. EnergyCode validates that your LLFC's market segment matches your actual supply type.
Example
LLFC 100 maps to NON_DOMESTIC segment, tariff ND_AGG_B1Related terms
Put this into practice
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