Why hang the gloves instead of laying them flat?

A 410 mm glove laid flat folds twice and takes a 0.3 mm set along those lines within 30 days. Hanging keeps the fingers 35 mm off the floor and gets a pair out in 4 seconds.

Does splitting the tester loosen the joint?

The channels carry it, not the joint. At 34 mm wide against a 32 mm shaft the tester rotates but cannot slide, and the 5 mm divider keeps the halves apart. The joint is only assembled after the case opens.

Is 150 g of desiccant enough, and when do you change it?

In a 20 L cavity against 80% RH outside, 150 g holds the interior under 55% RH for 45 days. The decision comes from the three-patch card inside the lid: when the 40% patch turns, the pack is spent, which costs less than one 10 kV retest.

Hand or shoulder for a 9 kg case at a charging site?

Distance decides. Under 200 m, carry it by the 25 mm handle; across sites at 800 m, use the 40 mm strap, which holds 2.2 kPa against 3.5 kPa.

Does passing the 0.9 m drop qualify the case?

It qualifies the shell only. Three checks follow: hook set no greater than 0.2 mm, floor dent springing back inside 0.4 mm, and both seal faces still aligned.

Charging Om Case: Charging O&M Tool Case

Quick answer: A charging om case separates gloves from testers: a 190 mm glove bay on a hangar bar, a 5 mm divider, 150 g of desiccant holding 50% RH, and 9 kg all in.

Two Gloves Hanging, Not Folded
A 5 mm Divider and a 1.5 m Tester in Two Halves
Holding 50% RH with 150 g of Desiccant
Nine Kilograms, Two Ways to Carry
A 0.9 m Drop on the Shoulder-Side Edge
FAQ

1. Two Gloves Hanging, Not Folded

Insulating gloves rarely fail from abrasion. They fail from creasing. A glove runs 410 mm from fingertip to cuff and 130 mm across the palm, and rolling a pair into a pouch leaves a fold the rubber remembers: 30 days later there is a 0.3 mm groove, and the next dielectric test finds it.

So the glove bay is built vertically. Clear width is 190 mm, depth 210 mm, height 260 mm, with a 12 mm bar across the top. Both cuffs go over the bar and the fingers hang 35 mm clear of the bay floor. Six 4 mm vents are staggered away from the bar, so moist air leaves downward.

With cuffs opened to 190 mm, air moves around the inside of the gloves and talc-dusted rubber never bonds to the wall. Squeeze them into 120 mm and the pull-out rolls the cuff bead loose.

Glove bay clear width	Cuff opening	Draw time	Crease risk	Typical use
120 mm	Collapsed	8 s	High, cuff rolls	Short site runs
190 mm	Hanging open	4 s	Low, no wall contact	Daily station work
240 mm	Open, side rests	4 s	Low, bay runs large	Shared two-person case
Layered flat	None	12 s	Highest, fixed fold	Not advised

2. A 5 mm Divider and a 1.5 m Tester in Two Halves

Collapsed, the voltage tester measures 750 mm; extended it reaches 1.5 m, with a 32 mm shaft and a 90 mm head. Nothing that long lies down inside a 420 mm cavity, so it travels as two 750 mm halves, each in a channel cut by a 5 mm divider.

Charging om case empty and open on grey, foam cut into mixed squares and narrow slots, PAT moulded into the left wall

The divider is 5 mm homopolymer PP and each channel is 34 mm wide, 2 mm over the shaft, so the tester rotates but cannot slide. Channel walls stand 90 mm, 45 mm above the centreline, so a tipped case loads the divider, not the glove bay partition. Stack both halves in one channel and the 3 mm gap drums on every bump.

Why 5 mm over 3 mm: a 3 mm wall at 90 mm tall has 36% of the lateral stiffness, so 20 N at the top edge bends it 6 mm onto the shaft. The 5 mm wall bends 2.2 mm and keeps 0.8 mm of clearance.

3. Holding 50% RH with 150 g of Desiccant

Insulating tools lose margin fast with moisture. Let internal humidity climb from 45% RH to 65% RH and leakage across a glove surface rises from 0.4 mA to 1.1 mA at a 10 kV test. A retest follows.

A 150 g montmorillonite pack holds 50% RH for 45 days in a 20 L cavity. At 25 °C against 80% RH outside, the interior sits at 42–46% RH for 20 days, reaches 50% RH by day 30 and crosses 55% RH at day 45.

The pack rides in a lid pocket with three 5 mm holes, isolated from the glove bay. The indicator card mounts inside the lid: three patches for 10%, 40% and 60% RH, turning from blue to pink when spent. On the outside of a charging om case nobody sees it at all.

Desiccant pack	Days held at 20 L	Humidity at day 45	Retest interval	Cavity volume
50 g	18 days	62% RH	15 days	Under 8 L
150 g	45 days	55% RH	45 days	15–22 L
300 g	90 days	52% RH	60 days	Over 30 L
None	5 days	78% RH	Weekly	Not advised

4. Nine Kilograms, Two Ways to Carry

Nine kilograms is the working ceiling. Two gloves weigh 1.2 kg, the tester 1.1 kg, the meter 0.4 kg, spare heads and cleaner 1.3 kg, the shell 5 kg. Add 2 kg and an 800 m shoulder carry starts pressing on the collarbone.

Charging om case shells stacked in four piles on a packing bench, a worker in a white tee boxing them

The strap is 40 mm wide and 8 mm thick, spreading contact over 60% more area than a 25 mm strap and dropping pressure from 3.5 kPa to 2.2 kPa. Anchors sit 30 mm above centre on both sides, so the case rides against the small of the back; centre them and 9 kg pitches 20 mm every step.

The handle is a 25 mm arc with a 110 mm grip and a 3 mm TPE sleeve, and both modes share one set of anchors.

Carry mode	Centre of mass	Comfortable range	Strap width	Limit
One hand	60 mm	200 m	None	Numb fingers past 3 kg
One shoulder	90 mm	800 m	40 mm	Swap sides every 15 min
Both shoulders	40 mm	1500 m	Two at 40 mm	Case must come off to open
Cart hook	150 mm	Unlimited	None	Case swings off-road

5. A 0.9 m Drop on the Shoulder-Side Edge

The 0.9 m figure is measured. On a 1.7 m user the bottom of a shoulder-carried case hangs 0.85–0.95 m off the ground, and the first thing to land is the long edge nearest the body.

That edge is where lid and body overlap. Of the two seals, the outer one is a 6 mm solid gasket compressed 2 mm and the inner one a 3 mm lip. The latches take the impact: at 3 g each of the two shares 4.5 kg, or 27 N, and neither hook may show more than 0.2 mm of permanent set.

Walls run 5 mm and the lid 4 mm, so the floor dents 1.8 mm and springs back to 0.4 mm. Four feet move the contact point onto a flat: 8 mm tall, 30 mm across, compressing 1.5 mm before rebounding.

Conclusion

A charging om case solves two problems, separation and moisture: a 190 mm glove bay on a 12 mm bar, a 1.5 m tester split into two 750 mm halves behind a 5 mm divider, and 150 g of desiccant holding 50% RH for 45 days. Nine kilograms, a 40 mm strap and a 0.9 m drop set the carrying limits.