Fire resistance, circuit integrity

The cable keeps its circuit working for a stated time in a fire (emergency lighting, alarms, smoke extraction, pumps).

Constructions that meet it

Glass-mica tape over each conductor: changes the cable's layers. Glass-mica tape(s) lapped over each conductor under the insulation (mica on glass cloth). Drawbacks: Most common; slightly larger diameter, care at stripping.
Ceramifying insulation: changes no layer: a property of the insulation compound. Ceramifying (silicone or polymer) insulation or fire barrier compound (ceramifying compound (Datwyler 'Keram')). Drawbacks: No extra layer; compound cost.
Halogen-free sheath over the fire barrier: changes the cable's layers. Halogen-free flame-retardant sheath (LSZH) over the fire barrier, often a red or orange sheath (LSZH). Drawbacks: Required alongside for most fire-resistant families.
Mineral insulated copper sheathed cable (MICC): changes the cable's layers. Mineral insulated copper sheathed cable (MICC) (MgO in copper tube). Drawbacks: Typical alternative; special terminations. No maker sheet read here.

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IEC 60331-1:2018: fire with shock, at least 830 °C, cables over 20 mm, up to 0.6/1 kV. Pass: circuit integrity for the stated time (Draka: 120 min)
IEC 60331-2:2018: same for cables up to 20 mm. Pass: stated time (Draka, Datwyler: 120 min)
IEC 60331-11 / -21: fire alone, at least 750 °C. Pass: stated time (Datwyler 180 min; Draka also 180 min at 1000 °C, enhanced)
BS 6387: C: 950 °C for 3 h; W: 650 °C 15 min + 15 min with water; Z: 950 °C 15 min with shock every 30 s. Pass: CWZ = all three
EN 50200 (BS EN 50200): 830 °C with shock every 5 min, cables up to 20 mm; Annex E water spray. Pass: PH15, PH30, PH60, PH90, PH120
BS 8434-2: 930 °C version of EN 50200 with water spray, plus EN 50200 PH120. Pass: 120 min
BS 8491:2008: cables over 20 mm, 842 °C, impact and water jet. Pass: F30, F60, F120
DIN 4102-12: system test of cable with its supports in a furnace on a standard temperature curve, at up to 400 V. Pass: E30, E60, E90 (system circuit integrity, depends on the support system)
VDE 0472-814: insulation integrity. Pass: FE180

Named by test and class: 'FE180 / E90', 'PH120', 'BS 6387 CWZ', 'IEC 60331-1/-2 120 min'. National codes decide which.

IEC 60331-1:2018 webstore abstract (830 °C, over 20 mm, up to 0.6/1 kV; smaller cables to IEC 60331-2) (quoted by others)
IEC 60331-11:1999+A1:2009 abstract (at least 750 °C, fire alone) (quoted by others)
Prysmian UK, 'What's changed since the CWZ test?' (BS 6387 C, W, Z; EN 50200 830 °C, PH classes; BS 8434-2 930 °C) (maker's catalogue)
BSI listing and secondary summaries of BS 8491 (over 20 mm, 842 °C, F30/F60/F120) (quoted by others)
Datwyler (N)HXCH FE180 E90 datasheet (Keram fire barrier; FE180 VDE 0472-814; IEC 60331-11/-21 180 min; IEC 60331-1/-2 120 min; EN 50200 PH120; BS 6387 CWZ; DIN 4102-12 E90 at up to 400 V; orange sheath) (maker's catalogue)
Draka BFOU M datasheet p.3 (IEC 60331-1 & -2 120 min at 830 °C; IEC 60331-21 180 min at 1000 °C) (maker's catalogue)