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Four size charts, and how to read a code before you quote it

Place the end on the scale first: the band strikes out whole families, and a measured diameter only chooses between the codes left standing.

The cable-side family, band by band

What is charted here, and what nobody publishes

Four charts are reproduced below as the manufacturer prints them: the GHSG gland taking a cable through an enclosure wall, the GAC cap closing an anode-to-lead-wire joint under backfill, the GEC L-PE cap that seals a duct-bound end and pulls on it, and the GSES seal holding curing pressure on a continuous-vulcanisation line. Two further ranges are published as spans only. Pole and pile caps have no per-size table at all — five sizes covering 140 to 460 mm (5.5 to 18.1 in), and finer rows would have to be invented.

Every heat-shrink part in these charts carries two internal diameters, and both have to be true. The supplied figure is a minimum, taken before the part has been heated, and must clear whatever you are pushing it over. The recovered figure is a maximum, taken after heating with nothing inside, and must sit below that same thing. A part whose recovered maximum exceeds your substrate has nowhere to go: it heats, stops short of contact, and the adhesive never wets the surface it was meant to.

Leave travel in hand. A jacket gone oval on a drum, a split pile top, an anode already carrying mastic — each is wider at one point than the mean you measured, and a code taken at the top of its published range has spent its recovery on the last few millimetres.

Worked, on the gland chart. Measure over the jacket where the gland mouth will finish: 26 mm. GHSG-3 is out, its range stopping at 25 mm. GHSG-4 takes it — supplied 39 mm slides on without forcing, recovered 19 mm sits 7 mm below the jacket, and that gap is the travel that drives adhesive into it. The code above fails for the opposite reason: GHSG-5 recovers to 35.5 mm at most, wider than the cable, so it can never touch it. A bigger part is not a safer part.

The notation, once, for every chart on this site

D and d: Two internal diameters on one part, not a diameter and a wall. D is the wide end, d the narrow end the lead wire leaves through. A chart carrying both describes a part that steps down.
s — as supplied: Out of the bag, expanded, never heated. Always quoted as a minimum: the part is at least this open.
f — after free recovery: Heated with nothing inside it. Always quoted as a maximum: left alone the part closes at least this far, and on a substrate it stops when it meets one.
Ds, Df, ds, df: The four combinations. Ds is the wide end supplied, Df the wide end recovered; ds and df are the same pair at the narrow end. Ds and Df are what you check a measurement against.
Ta and Tw: Recovered wall at the anode end and the wire end of a GAC cap, each ±10 per cent. A mechanical figure, not a fit figure — what the cap survives being knocked against during backfill.
TL, La, Lw: Total length of a GAC cap and its split between anode end and wire end. The two add to the total in every row, which is the check to run on a chart that reaches you scrambled.
A and B: On the gland chart, printed with no key. They scale with the part and are not internal diameters. Do not dimension an enclosure cut-out from them.
Cable diameter range: The manufacturer's own conclusion from the two diameters, and the column to quote from where it and your arithmetic disagree at a boundary.

Heat-shrinkable gland, GHSG-1 to GHSG-5

Gala code	A	B	Supplied ID (min.)	Recovered ID (max.)	Cable diameter range
GHSG-1	70	25	13	4.3	5 – 103
GHSG-2	70	25	19	5.5	6 – 17
GHSG-3	95	35	29	12.5	14 – 25
GHSG-4	116	51	39	19	20 – 37
GHSG-5	178	89	70	35.5	37 – 67

Millimetres. The GHSG-1 row is printed as published and does not hold together: a range topping out at 103 mm cannot be served by a part supplied at 13 mm internal diameter. Treat GHSG-1 as the smallest code in the family and confirm its upper bound before quoting. The other four rows are internally consistent.

Anode cap, GAC 0420 to GAC 0550

Code	Ds (min.)	Df (max.)	ds (min.)	df (max.)	TL set 1	La set 1	Lw set 1	TL set 2	La set 2	Lw set 2	Ta	Tw
GAC 0420	41	20	13	4.5	120	55	65	135	65	70	3.5	2.5
GAC 0420A	50	20	14	4.5	115	55	60	135	63	70	3.5	2.5
GAC 0540	82	40	16	5.0	150	85	65	180	116	64	4.7	3.7
GAC 0540A	108	40	16	5.0	140	80	60	180	116	64	4.8	3.8
GAC 0550S	108	50	20	5.5	180	90	90	250	140	110	4.7	3.9
GAC 0550	145	50	20	5.5	175	90	85	250	140	110	4.7	3.9

Millimetres; lengths ±2 per cent, Ta and Tw ±10 per cent. The published key covers D, d, s, f, Ta and Tw and stops there — the two length groups carry no s or f marker, so their order is inferred from the diameter columns, not stated. La + Lw = TL holds within each group. Confirm which set is which against the manufacturer's anode cap page before dimensioning a drawing from it.

End cap with pulling eye, GEC 301L-PE to GEC 701L-PE

Code no.	Ds (min.)	Df (max.)	Ls (min.)	Tf ±10%	Pulling strength (min.)	Cable range
GEC 301L-PE	55	25	170	3.5	150 kg	28 – 38
GEC 401L-PE	75	35	180	4.0	250 kg	38 – 52
GEC 501L-PE	100	45	200	4.0	300 kg	50 – 70
GEC 601L-PE	130	65	300	4.6	400 kg	65 – 91
GEC 701L-PE	160	65	300	4.5	450 kg	80 – 112

Millimetres, pulling strength as published in kilogrammes. The only chart of the four where a second figure can rule a code out after the diameter has ruled it in — the cable maker's own maximum pulling tension, and the lower of the two limits governs the draw. Ls is a supplied minimum length, Tf a recovered wall ±10 per cent; neither changes the fit. The part page is end cap with pulling eye.

Elastomeric CV-line end seal, GSES-1S and GSES-1

Gala code	A	B	C	D	E	F	G	H
GSES-1S	180	156	129	47	10	30°	60°	6 × 60° ⌀9
GSES-1	255	226	195	68	10	30°	60°	6 × 60° ⌀9

A rubber sealing unit for the exit side of a CCV, VCV or SSCV line, not a cap fitted to a cut end — charted here because the plant engineer sizing one arrives on the same search. A to E are millimetres. F, G and H sit under the same heading and are not lengths: two angles and a hole pattern. The unit opens and closes hydraulically from the control panel, so A is the dimension that has to agree with the frame.

Three ranges published as spans, with no rows behind them

The Insulcap cable end cap runs GEC 001S to GEC 1101, covering cable from 2–4 mm at the smallest code to 230–460 mm at the largest. Its relief-valved variant runs GEC 102 RV to GEC 801 RV, 12 to 200 mm. Pole and pile caps are five sizes across 140 to 460 mm. None of the three is published code by code, and intermediate rows would be fabricated rather than reproduced, so none appears here. The spans are wide enough that the arithmetic above will not get you to a code on your own — send the diameter.

Questions that arrive with a measurement attached

Where exactly do I measure?

Over the outside of the jacket, where the mouth of the cap or gland will finish — not at the cut face, not over the armour bedding. Take it twice at ninety degrees and use the larger figure.

My diameter sits inside two codes. Which do I quote?

Prefer the smaller. Between 20 and 25 mm the gland chart accepts GHSG-3 and GHSG-4 both, and GHSG-3 travels from 29 mm to a 12.5 mm maximum against GHSG-4's 39 mm to 19 mm — more recovery onto the jacket, and more of it spare for a sheath that is not round. Go up only when the part has to pass over something wider on its way on, such as a lug or a bulge of mastic.

Is there a single end cap dimensions PDF?

No combined dimension sheet exists. Datasheets are per product and the four charts above come from four of them, which is why this page is here. The gland datasheet is linked below.

Is there a size chart for the push-on PVC cap?

None is published, and that follows from how the part is made: a moulded shell sized to the end it covers, made in custom lengths and thicknesses without a tooling charge, so sizing it is a drawing rather than a code. See PVC push-on end caps.

Does a chart tell me how wet the end can get?

No. A chart settles fit, which is the first of two decisions. IP68 sealing belongs to the lined heat-shrink parts and is published per product, not per size, so a correctly sized cap of the wrong family is still wrong. Start at cable end caps if the band is unsettled.

The part behind each chart

One diameter usually closes this out

A measurement over the jacket, pile top or anode body, plus the band the end will live in, is normally enough to name a code from the charts above. Open End is a reference site: the parts are made by Gala Thermo Shrink Pvt. Ltd. of Mumbai, and nothing here is stocked, priced or scheduled.

Send the dimension What opens a correctly sized seal